Calculate The Number Of Moles Of Solute In 90.99 ML Of 0.1065 M K2Cr2O7(aq). (2024)

Chemistry College

Answers

Answer 1

Answer:1.170 M K2Cr2O7

Explanation:

moles = Molarity / liters

moles = 0.1065 M / 0.09099 L =

Related Questions

The contents of two vessels are combined as shown. The balanced chemical equation for the reaction that occurs is also shown. Which of the following represents the constants of the reaction vessel after the N2 and Cl2 react as completely as possible?

Answers

The correct option that represents the constants of the reaction vessel after the N₂ and Cl₂ react as completely as possible is A.

How to determine reaction vessel?

The balanced chemical equation for the reaction is:

N₂(g) + 3Cl₂(g) → 2NCl₃(g)

This means that 1 mole of nitrogen gas and 3 moles of chlorine gas react to produce 2 moles of nitrogen trichloride gas.

The contents of the two vessels are:

Vessel 1: 1 mole of N₂

Vessel 2: 3 moles of Cl₂

When these two vessels are combined, the chlorine gas will react completely with the nitrogen gas to produce nitrogen trichloride gas. The remaining gas in the vessel will be nitrogen trichloride gas.

Which is:

[N₂] = 0 mol

[Cl₂] = 0 mol

[NCl₃] = 2 mol

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Complete question:

11 Question 3 A =N O=CI N2 +3 Cl2 2 NC13 The contents of two vessels are combined, as shown. The balanced chemical equation for the reaction that occurs is also shown. Which of the following represents the contents of the reaction vessel after the N2 and Cl2 react as completely as possible?

Which of the following scenarios describes an example of a sustainable practice that individuals or families can implement?

A family uses a sprinkler system to water their lawn on a daily basis.
A family uses a sprinkler system to water their lawn on a daily basis.

A) An individual always uses single-use plastic bottles for their drinking water.
B) An individual always uses single-use plastic bottles for their drinking water.
C) An individual rides their bicycle or uses public transportation to go to work.
D) An individual rides their bicycle or uses public transportation to go to work.
E) A family washes and dries multiple loads of laundry each day of the week.

Answers

The right response is C) A person commutes to work on a bicycle or by taking public transit. This is an illustration of a sustainable behaviour that people or families may adopt since it lessens their carbon footprint and promotes energy conservation.

People may decrease their dependency on vehicles, which are a significant source of greenhouse gas emissions, by adopting a bicycle or public transit. This promotes a healthier environment and lowers air pollution.

Additionally, users may save money on petrol and automobile maintenance by switching from driving to public transit. People may also lessen their reliance on oil, which is a limited resource, by using bicycles or public transit. This environmentally friendly method can assist to protect the environment.

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11) If I have 2.75 moles of gas at a
temperature of 175 K and a pressure of 177.3
mmHg, what is the volume of the gas?

Answers

We can use the Ideal Gas Law to solve for the volume of the gas:

PV = nRT

where:
P = pressure = 177.3 mmHg
V = volume (unknown)
n = moles = 2.75 mol
R = gas constant = 0.08206 L·atm/mol·K
T = temperature = 175 K

Substituting the values:

V = nRT/P
V = (2.75 mol)(0.08206 L·atm/mol·K)(175 K)/(177.3 mmHg)
V = 5.33 L (rounded to two decimal places)

Therefore, the volume of the gas is approximately 5.33 L.

Answer:

The volume of the gas is approximately 19.4 liters.

Explanation:

We can use the Ideal Gas Law to solve for the volume of the gas:

[tex]PV = nRT[/tex]

Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to convert the temperature to Kelvin by adding 273.15:

[tex]175 K + 273.15 = 448.15 K[/tex]

Next, we can plug in the values and solve for V:

[tex]V = (nRT) / P[/tex]

[tex]V = (2.75 mol * 0.0821 Latm/molK * 448.15 K) / (177.3 mmHg / 760 mmHg/atm)[/tex]

V ≈ 19.4 L

What is the Ka for an acid HA, if the equilibrium concentrations are [HA]=0.822 M, [H3O+]=1.15×10−4 M, and [A−]=1.15×10−4 M?

Report your answer in scientific notation.
Your answer should have three significant figures.

Answers

[.822] that’s the answer

Given the reaction: 2H2 +O2 = 2H2O. The total numbers of grams of o2 needed to produce 54g of water is

Answers

Answer: 48 g O2

Explanation:

54 grams x ( 1 mole H2O / 18 g H20) X ( 1 mole O2/ 2moles H2O) X (32 grams O2/ 1mole O2) = 48 g O2

Why are chromosomes important? They play a role in cell division. They pass molecules through the nucleus. They produce food for a plant cell. They provide energy to the cell.

Answers

Chromosomes important because they play a role in cell division.

What is cell division?

Cell division is described as the process by which a parent cell divides into two daughter cells and usually occurs as part of a larger cell cycle in which the cell grows and replicates its chromosome before dividing.

Chromosomes has another function of ensuring that each new cell receives a complete set of genetic information which is required for proper cell function and development.

In conclusion, there are two types of cell division which are mitosis and meiosis.

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A gas has a volume of 54.0 mL at 475 torr and -13 degrees C . What will be the new volume be at STP?

Answers

Answer:35.437 mL

Explanation:

Combined gas law

P1V1/T1 = P2V2/T2

P1= 475 torr

V1= 54 mL

T1= 260.15 Kelvin

T2= 273.15 Kelvine

P2= 760 torr

V2=

V2=P1V1T2/(T1P2) m

V2= 475 X 54 X 273.15 / (260.15 X 760) =35.437 mL

What does the formula tell you about the numbers of each kind of atom that are combined together

Answers

The molecular formula tell you about the numbers of each kind of atom that are combined together and it helps in naming of ionic compounds.

Ionic compounds are formed when ions with opposing negative and positive charges form ionic bonds and form compounds, which are compounds made of ions. The molecular formula tell you about the numbers of each kind of atom that are combined together

Ionic compounds are named by stating the cation first, followed by the anion. When a neutral atom loses one or more electrons, it acquires a positive charge and is called a cation and when an atom gains one or more electrons, it becomes an anion and acquires a negative charge.

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Hydrogen = odorless, colorless, and tasteless (so it's undetectable to human senses) but highly flammable and used in jet fuel

Directions:

Identify another chemical reaction that is important to your daily life. (Hint: THIS

Answers

One important chemical reaction in our daily life is the process of cellular respiration, which occurs in living organisms to produce energy in the form of ATP.

The reaction involves the breakdown of glucose, a type of sugar, into carbon dioxide and water, and the release of energy in the process. The general equation for cellular respiration is,

[tex]C_{6} H_{12} O_{6}[/tex] + [tex]6O_{2}[/tex] → [tex]6CO_{2}[/tex] + [tex]6H_{2}O[/tex] + energy (ATP)

This reaction occurs continuously in our cells, providing the energy needed for various cellular activities and bodily functions. Without cellular respiration, we would not be able to survive.

Another important application of chemical reactions in daily life is in the production of food. Cooking food involves various chemical reactions, including the breakdown of complex carbohydrates and proteins into simpler molecules, the caramelization of sugars, and the Maillard reaction between amino acids and reducing sugars. These reactions help to create the flavor, aroma, and texture of the food we eat.

In addition, chemical reactions are also used in the production of many consumer products, such as cleaning agents, cosmetics, and pharmaceuticals. The chemical reactions involved in these products are carefully designed and controlled to ensure their effectiveness and safety for use.

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moles of C2H6O in 8.50x1023 molecules of C2H6O

Answers

There are approximately 1.41 moles of C2H6O in 8.50x10^23 molecules of C2H6O.

To determine the moles of C2H6O in 8.50x10^23 molecules of C2H6O, we need to use Avogadro's number, which states that one mole of any substance contains 6.022x10^23 particles. In this case, the particles are molecules of C2H6O.

Given that there are 8.50x10^23 molecules of C2H6O, we can divide this number by Avogadro's number to find the moles of C2H6O:Moles of C2H6O = (8.50x10^23 molecules) / (6.022x10^23 molecules/mol)

Calculating this expression gives us:

Moles of C2H6O = 1.41 moles

When given the number of molecules, we divide it by Avogadro's number to find the corresponding number of moles. In this case, 8.50x10^23 molecules of C2H6O is equivalent to approximately 1.41 moles of C2H6O.

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You make Kool- Aid. Unfortunately, you misread the directions and made 0.512 L at a concentration of 13.2 M. In order for it to taste good it needs to be only 2.00 M. How much water do you need to add to make taste good? Show your work.

Answers

To dilute the Kool-Aid solution to a concentration of 2.00 M, we need to calculate the volume of water (Vw) that needs to be added.

The initial concentration of Kool-Aid solution is 13.2 M, and the initial volume is 0.512 L. Let's assume that Vw is the volume of water we need to add to dilute the solution to a concentration of 2.00 M.

Since the total volume after dilution will be the sum of the initial volume of Kool-Aid solution and the volume of water added, we can set up the following equation based on the dilution formula:

C1V1 = C2V2

where

C1 = initial concentration of Kool-Aid solution = 13.2 M

V1 = initial volume of Kool-Aid solution = 0.512 L

C2 = final concentration of Kool-Aid solution = 2.00 M

V2 = final volume of Kool-Aid solution after adding water = 0.512 L + Vw

Substituting the given values into the equation, we get:

13.2 M x 0.512 L = 2.00 M x (0.512 L + Vw)

Simplifying the equation, we get:

6.7584 L·M = 1.024 L·M + 2.00 M·Vw

Subtracting 1.024 L·M from both sides, we get:

5.7344 L·M = 2.00 M·Vw

Dividing both sides by 2.00 M, we get:

Vw = 2.8672 L

Therefore, we need to add 2.8672 L of water to 0.512 L of 13.2 M Kool-Aid solution to dilute it to a concentration of 2.00 M.

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a. Using the Born-Mayer Equation, calculate the lattice enthalpy for sphalerite
(zinc blende), ZnS. You must look up the appropriate parameters for the equation.

b. Using the Born-Mayer Equation, calculate the lattice enthalpy for wurtzite, ZnS. You must
look up the appropriate parameters for the equation.

c. Which is thermodynamically stable at ambient conditions (25 °C, 1 bar)? Find a reference
with the T and P phase diagram for ZnS. Submit the pdf of the reference with your file . Also,
compare your answer to the standard enthalpies of formation for wurtzite compared to sphalerite.

Answers

ΔLatticeU = ΔLatticeH – pΔVm is the lattice energy of wurtzite. Ionic compounds often have flat surfaces that meet at distinctive angles and are stiff, brittle, crystalline materials.

Remember that when a metal reacts with a nonmetal, often an ionic compound results from the transfer of electrons form the metal (the reductant) towards the nonmetal (the oxidant). Ionic compounds often have flat surfaces that meet at distinctive angles and are stiff, brittle, crystalline materials. They melt at rather high temperatures and are not easily distorted. ΔLatticeU = ΔLatticeH – pΔVm is the lattice energy of wurtzite.

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Identify another chemical reaction that is important to your daily life hint this is a good resource

Answers

Photosynthesis is a chemical reaction it leads to the generation of oxygen and provides food for both plants and animals.

This is the process by which plants convert carbon dioxide and water into glucose and oxygen using energy from the sun. It is the basis for all life on Earth, as it provides the energy and oxygen necessary for life.

Photosynthesis is the process by which plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of glucose and other organic compounds.

This process is carried out by special structures called chloroplasts, which contain a pigment called chlorophyll that gives plants their green color.

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Relate the temperature of atmospheric gases to the production of rain.

Answers

Better temperatures can growth the quantity of water vapor withinside the air, that could growth the probability of precipitation.

Different factors, inclusive of air pressure, wind, and atmospheric instability, additionally play a function withinside the formation of rain, and the connection among temperature and precipitation may be complicated. The temperature of atmospheric gases could have a substantial effect at the manufacturing of rain. The environment is a complicated device that performs a vital function with inside the Earth`s water cycle, which incorporates the system of precipitation, inclusive of rain. Precipitation takes place while water vapor with inside the air condenses into liquid droplets or ice crystals, which fall to the floor as rain, snow, or hail. The temperature of the environment impacts the quantity of water vapor that the air can preserve. As temperature increases, the air can preserve extra water vapor, that could cause better tiers of humidity. When the air will become saturated with water vapor, it reaches its dew point, and the extra water vapor condenses into liquid droplets or ice crystals, that could shape clouds and subsequently precipitation. In addition, international warming, that's inflicting an growth in atmospheric temperatures, can cause modifications in precipitation styles and extra severe climate events. Understanding the connection among temperature and precipitation is vital for predicting and mitigating the affects of weather change.

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If 30grams Aluminum reacts with 26grams Oxygen, what mass of Aluminum Oxide will be produced?

Answers

The balanced chemical equation for the reaction between aluminum and oxygen to produce aluminum oxide is:

4Al + 3O2 → 2Al2O3

This equation tells us that 4 moles of aluminum react with 3 moles of oxygen to produce 2 moles of aluminum oxide.

To solve the problem, we need to determine which reactant is limiting and which is in excess. We can do this by calculating the number of moles of each reactant and comparing them to the stoichiometric ratio in the balanced equation.

The molar mass of aluminum is 26.98 g/mol, so 30 g of aluminum is equal to:

30 g Al × (1 mol Al / 26.98 g Al) = 1.11 mol Al

The molar mass of oxygen is 32.00 g/mol, so 26 g of oxygen is equal to:

26 g O2 × (1 mol O2 / 32.00 g O2) = 0.81 mol O2

According to the balanced equation, 4 moles of aluminum react with 3 moles of oxygen. Therefore, if all of the oxygen reacts, the maximum amount of aluminum that can react is:

3 mol O2 × (4 mol Al / 3 mol O2) = 4 mol Al

Since we have only 1.11 mol of aluminum, it is the limiting reactant. This means that all of the aluminum will react, and some of the oxygen will be left over.

The amount of aluminum oxide produced can be calculated using the stoichiometry of the balanced equation. Since 4 moles of aluminum produce 2 moles of aluminum oxide, then 1.11 moles of aluminum will produce:

(2 mol Al2O3 / 4 mol Al) × 1.11 mol Al = 0.555 mol Al2O3

The molar mass of aluminum oxide is 101.96 g/mol, so the mass of aluminum oxide produced is:

0.555 mol Al2O3 × (101.96 g Al2O3 / 1 mol Al2O3) = 56.5 g Al2O3

Therefore, 56.5 grams of aluminum oxide will be produced.

describe an experiment procedure that can be used to extract oil from nut seeds?​

Answers

Get some nut seeds, like almonds or walnuts.

Clean and dry them.

Grind them into a powder.

Squeeze the oil out of the powder using a special machine or press.

Put the oil in a container and let it sit for a while.

Pour out the oil into a new container, leaving any dirt behind.

Use a special liquid to clean out any leftover oil.

Mix the oil with water and shake it to separate them.

Collect the oil from the top of the container.

Heat the oil to remove any leftover liquid.

Measure the amount of oil you collected.

chatgpt

Click Show formula, Show completed compounds, and Show charge. In the space below, write the formula for sodium chloride. What is the charge on the Sodium atom and what is the charge on the Chlorine atom? Explain why one atom has a negative charge and the other atom has a positive charge. Show each calculation of the atoms’ charge in the space below. Hint: Use a Periodic Table to determine the protons and electrons of a neutral atom. You can calculate the charge of an atom by subtracting the number of electrons from the number of protons

Answers

Answer:

Explanation:

sodium chloride = NaCl

Sodium atom charge is zero but the sodium ion is Na+

Clorine atom is zero chlorine ion is Cl-

Chlorine is negative due to gaining negatively charged electron

Sodium is positive due to it losing a negatively charged electron.

Na has 11 protons and 11 electrons when neutral

Cl has 17 portons and 17 electrons when neutral

2. Complete the chart below. Show your work using the crisscross method used to write ionic formulas.​

Answers

To determine the number of grams of sodium sulfate formed, we need to calculate the molar masses of sodium hydroxide (NaOH) and sodium sulfate (Na2SO4) and use stoichiometry.

The molar mass of NaOH:

Na = 22.99 g/mol

O = 16.00 g/mol

H = 1.01 g/mol

Molar mass of NaOH = 22.99 + 16.00 + 1.01 = 40.00 g/mol

The molar mass of Na2SO4:

Na = 22.99 g/mol

O = 16.00 g/mol

S = 32.07 g/mol

Molar mass of Na2SO4 = 2 * 22.99 + 4 * 16.00 + 32.07 = 142.04 g/mol

Now, we can set up the stoichiometric ratio using the balanced equation:

2 NaOH + H2SO4 → 2 H2O + Na2SO4

From the equation, we can see that 2 moles of NaOH react with 1 mole of H2SO4 to produce 1 mole of Na2SO4.

First, calculate the number of moles of NaOH:

Moles of NaOH = Mass of NaOH / Molar mass of NaOH

Moles of NaOH = 200 g / 40.00 g/mol = 5.00 mol

Since the ratio between NaOH and Na2SO4 is 2:1, the number of moles of Na2SO4 formed will be half of the moles of NaOH.

Moles of Na2SO4 = 0.5 * Moles of NaOH = 0.5 * 5.00 mol = 2.50 mol

Finally, calculate the mass of Na2SO4:

Mass of Na2SO4 = Moles of Na2SO4 * Molar mass of Na2SO4

Mass of Na2SO4 = 2.50 mol * 142.04 g/mol = 355.10 g

Therefore, if you start with 200 grams of sodium hydroxide and have an excess of sulfuric acid, approximately 355.10 grams of sodium sulfate will be formed.

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In what way(s) did the development of the bomb
prevent future wars?

Answers

The development of the atomic bomb had a significant impact on the world, particularly in the realm of international relations and warfare.

One of the main arguments for the bomb's development was that it could potentially prevent future wars by creating a deterrent effect against other nations who might consider starting a conflict.

The bombing of Hiroshima and Nagasaki demonstrated the devastating power of nuclear weapons and helped to bring about a realization that war in the nuclear age could result in catastrophic consequences for all parties involved.

The fear of mutually assured destruction (MAD) was a strong deterrent against the use of nuclear weapons during the Cold War, as both the United States and Soviet Union possessed nuclear weapons.

Additionally, the development of the bomb led to the creation of international organizations such as the United Nations and the International Atomic Energy Agency (IAEA) that were designed to promote international cooperation and prevent the spread of nuclear weapons.

The concept of nuclear disarmament became an important issue for many countries, and nuclear non-proliferation treaties were signed to prevent the spread of nuclear weapons to other countries.

While the development of the atomic bomb did not prevent all future wars, it did lead to a shift in thinking about the nature of war and the role of nuclear weapons in international relations.

The fear of nuclear war and the understanding of its potential consequences have helped to create a more peaceful world, at least in terms of major conflicts between nuclear powers.

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2C2H6+7O2=6H2O+4CO2 7.35 g was burned in the presence of 5.23 g O2. Which one is the limiting reagent?

Answers

Answer:

Explanation: O2

1) solve for opposites

A) 7.35 g C2H6 x ( 1 mole C2H6 /30 g C2H6) X ( 7 mole O2/ 2mole C2H6) X ( 32 g O2 / 1 mole O2) =27.44 g O2

B) 5.23 g O2 x ( 1/32) X (2/7) X (30/1) =1.401 G C2H6

2) now subtract answer from number given. The negative is the limiting and the positive is the excess

7.35 - 1.401 = 5.949 G C2H6 (Excess)

5.23-27.44 = -22.12 g O2 (limiting)

3) O2 is the Limiting

As the given equation was was burned in the presence of 5.23 g, we have less moles of O2, it is the limiting reagent in this reaction.

To determine which reagent is the limiting reagent, we need to compare the number of moles of each reagent with the stoichiometric coefficients in the balanced chemical equation.

First, let's calculate the number of moles of each reagent:

Number of moles of C2H6 = 7.35 g / 30.07 g/mol = 0.244 mol

Number of moles of O2 = 5.23 g / 32.00 g/mol = 0.163 mol

Now, let's use the balanced chemical equation to determine the stoichiometric ratio between the two reagents:

2C2H6 + 7O2 → 6H2O + 4CO2

According to the stoichiometry of the reaction, 2 moles of C2H6 react with 7 moles of O2. Therefore, the limiting reagent is the one that is present in lesser moles with respect to the stoichiometric ratio.

Thus, since we have less moles of O2, it is the limiting reagent in this reaction.

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What volume, in liters, of sulfur dioxide gas at 455 K and 2.03 atm is needed to produce 89.6 g of sulfur trioxide, SO₃?

Answers

Answer:

Explanation:

To solve this problem, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

First, we need to calculate the number of moles of sulfur trioxide (SO₃) using its molar mass.

Molar mass of SO₃:

Sulfur (S): 32.07 g/mol

Oxygen (O): 16.00 g/mol (there are 3 oxygen atoms in SO₃)

Total molar mass = 32.07 g/mol + 3 * 16.00 g/mol = 80.07 g/mol

Number of moles of SO₃ = Mass / Molar mass = 89.6 g / 80.07 g/mol = 1.12 mol

Now, we can rearrange the ideal gas law equation to solve for volume:

V = nRT / P

Given:

Temperature (T) = 455 K

Pressure (P) = 2.03 atm

Number of moles (n) = 1.12 mol

Ideal gas constant (R) = 0.0821 L·atm/(mol·K)

Plugging in these values, we can calculate the volume (V):

V = (1.12 mol * 0.0821 L·atm/(mol·K) * 455 K) / 2.03 atm

V ≈ 21.5 L

Therefore, the volume of sulfur dioxide gas required to produce 89.6 g of sulfur trioxide at 455 K and 2.03 atm is approximately 21.5 liters.

Directions: Please show all work, round each answer the correct number of significant figure
and include units where appropriate.
d) [H] = 4.52 x 10 M
Date:
Unit: Acids, Bases, and Solutions
"Acid/Base Calculations" - WS #4
1. Calculate the pH of the solutions, given the following [H], and then identify the solution
as acidic, basic, or neutral.
a) [H'] = 1.2 x 10¹ M
b) [H] = 5.8 x 10° M
c) [H] - 3.92 x 10" M
b) pH = 11.7+9
c) pH=6.8
2. Calculate the [H] in the following solutions, given their pH, and identify the solution as
acidic, basic or neutral.
a) pH = 2.5
d) pH = 3.31
Class period:
3. Given the following pOH's, calculate the pH for the solution:
a) pOH = 4.18
b) pOH = 12.35
4. Given the following pH's, calculate the pOH for the solution:
a) pH = 6.2
b) pH=9.55

Answers

The solutions ae all acidic with pH less than 7.

a) To calculate the pH of a solution with [H+] = 1.2 x 10^(-1) M:

pH = -log[H+]

pH = -log(1.2 x 10^(-1))

pH = -log(1.2) + log(10^(-1))

pH = -log(1.2) - 1

pH ≈ 0.92

The solution is acidic.

b) To calculate the pH of a solution with [H+] = 5.8 x 10^0 M:

pH = -log[H+]

pH = -log(5.8 x 10^0)

pH = -log(5.8)

pH ≈ 0.24

The solution is acidic.

c) To calculate the pH of a solution with [H+] = 3.92 x 10^(-3) M:

pH = -log[H+]

pH = -log(3.92 x 10^(-3))

pH ≈ 2.41

The solution is acidic.

a) To calculate [H+] in a solution with pH = 2.5:

[H+] = 10^(-pH)

[H+] = 10^(-2.5)

[H+] ≈ 3.16 x 10^(-3) M

The solution is acidic.

b) To calculate [H+] in a solution with pH = 3.31:

[H+] = 10^(-pH)

[H+] = 10^(-3.31)

[H+] ≈ 4.54 x 10^(-4) M

The solution is acidic.

a) To calculate the pH for a solution with pOH = 4.18:

pOH + pH = 14

pH = 14 - pOH

pH = 14 - 4.18

pH ≈ 9.82

b) To calculate the pH for a solution with pOH = 12.35:

pOH + pH = 14

pH = 14 - pOH

pH = 14 - 12.35

pH ≈ 1.65

a) To calculate the pOH for a solution with pH = 6.2:

pOH + pH = 14

pOH = 14 - pH

pOH = 14 - 6.2

pOH ≈ 7.8

b) To calculate the pOH for a solution with pH = 9.55:

pOH + pH = 14

pOH = 14 - pH

pOH = 14 - 9.55

pOH ≈ 4.45

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Lesson 06.02 and 06.03: Reading for Argument Graphic Organizer
Answer the questions and complete the graphic organizers as you move through the
two lessons. The notes on 6.02 will help you on your Lesson 6.02 assessment. The whole
graphic organizer will be submitted in lesson 6.03.
6.02: Summarize the Claims and Evidence
2
1. 1. What are the Constitution and Declaration of Independence described as?
Excerpt #
1
3
1. 2. Summarize the claims and evidence King uses in his speech. Excerpt 1 has been
completed as an example for you.
Claims and Evidence
Claim 1: The Constitution and the Declaration of Independence promise
equal rights to all Americans, not just white people.
Claim 2: America has failed to deliver the rights promised by the
Constitution and Declaration of Independence to black people.
Evidence for Claim 2:
Evidence for Claim 2:
Claim 3:
Claim 4:

Answers

They are described as promissory notes that guarantee the unalienable rights of life, liberty, and the pursuit of happiness.

Claim 1 is that the Constitution and the Declaration of Independence give equal rights to all Americans. The evidence for this claim is found in the article of the Declaration of Independence.

Claim 2 is that America has failed to deliver these rights to black people. The evidence for this is found in the speech "I Have a Dream" by Martin Luther King Jr.

What are the Constitution and Declaration of Independence?

The Constitution and Declaration of Independence are described as promissory notes that guarantee the unalienable rights of life, liberty, and the pursuit of happiness.

Following are the Claims and Evidence:

Claim 1: All Americans, not only whites, are guaranteed equal rights under the Constitution and the Declaration of Independence.

The Declaration of Independence has supporting evidence for Claim 1.

Claim 2: The United States has failed to grant black people the rights outlined in the Constitution and Declaration of Independence.

Martin Luther King Jr.'s "I Have a Dream" speech serves as proof for Claim 2.

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100 grams of reactants completely react to form the products in a reaction how many grams of product are produced​

Answers

If 100 grams of reactants completely react to form the products in a reaction, the amount of products produced will also be 100 grams.

Law of conservation of mass

The law of mass conservation states that in a closed system, the total mass remains constant before and after a chemical reaction. This means that the mass of the reactants is equal to the mass of the products.

To solve the given problem, the law of mass conservation can be applied by assuming that the reaction is complete.

Thus, if 100 grams of reactants completely react, it implies that the total mass of the products formed will also be 100 grams, assuming no other substances are involved in the reaction.

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Example A vegetable are chopped Example B food is broken up into simpler form during digestion which statement is correct

Answers

Both Example A and Example B are correct, but they refer to different processes. Example A refers to the physical action of chopping vegetables into smaller pieces, which can make them easier to cook and eat.

This process does not change the fundamental nature of the vegetable, but simply alters its physical properties.

Example B, on the other hand, refers to the process of digestion in the human body. During digestion, food is broken down into simpler forms, such as sugars, amino acids, and fatty acids, which can be absorbed and used by the body for energy and other functions. This process involves both physical and chemical changes, as enzymes in the digestive system break down complex molecules into simpler ones.

In summary, Example A describes a physical process that alters the size and shape of a vegetable, while Example B describes a physiological process that breaks down complex food molecules into simpler forms for use by the body. Both processes are important for preparing and consuming nutritious food.

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Consider the following reaction: 2 A (g) —> 2 B(g) + C(g) Kp = 1.67 × 10-7
PA, initial = 3.00 atm and PB, initial = 0.450 atm. Determine PA, eq, PB, eq, and PC, eq.

Answers

The equilibrium pressures are:

PA, eq = 0.000536 atmPB, eq = 0.450536 atmPC, eq = 0.000268 atm

How to determine equilibrium pressure?

The balanced equation is: 2 A (g) → 2 B (g) + C (g)

The equilibrium constant, Kp = 1.67 × 10⁻⁷ Pa

Initial pressure of A, PA, initial = 3.00 atm

Initial pressure of B, PB, initial = 0.450 atm

Assume that at equilibrium, the pressure of A is PA, eq, the pressure of B is PB, eq, and the pressure of C is PC, eq.

Using the stoichiometry of the reaction, set up a table to determine the equilibrium pressures:

2 A(g) → 2 B(g) + C(g)

Initial 3.00 atm 0 0

Change -2x +2x +x

Equilibrium 3.00 - 2x 0 + 2x 0 + x

The expression for Kp is:

Kp = (PB, eq)²(PC, eq) / (PA, eq)²

Substituting the equilibrium pressures into the expression for Kp:

1.67 × 10⁻⁷ Pa = (0.450 + 2x)² (x) / (3.00 - 2x)²

Solving for x:

x = 0.000268 atm

Therefore, at equilibrium:

PA, eq = 2x = 0.000536 atm

PB, eq = 0.450 + 2x = 0.450536 atm

PC, eq = x = 0.000268 atm

So the equilibrium pressures are:

PA, eq = 0.000536 atm

PB, eq = 0.450536 atm

PC, eq = 0.000268 atm

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11. The formula of a hypothetical compound of tellurium is M2Te. Its composition is 80.0% Te, 20.0% M. The approximate atomic molar mass of element M is?

Te: 127 g mol (atomic molar mass)

Answers

The approximate atomic molar mass of element M in the compound, M₂Te, given that Te has molar mass of 127 g/mol is 42 g/mol

How do i determine the molar mass of M in the compound?

The following data were obtained from the question:

Percentage of Te = 80%Percentage of M = 20%Formula of compound = M₂TeMolar mass of Te = 127 g/molMolar mass of M = y =?

Percent of M = (Molar mass of M / Molar mass of M₂Te) × 100

20% = (y / Molar mass of M₂Te)

But

Molar mass of M₂Te = 2(molar mass of M) + 127

Molar mass of M₂Te = 2y + 127

Thus, we have

20% = y / (2y + 127)

0.2 = y / (2y + 127)

Cross multiply

0.2 × (2y + 127) = y

Clear bracket

0.4y + 25.4 = y

Collect like terms

25.4 = y - 0.4y

25.4 = 0.6y

Divide both sides by 0.6

y = 25.4 / 0.6

y = 42

Thus, the molar mass of M is 42 g/mol

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Enthalpy for C + O2 -> CO2

Answers

The enthalpy of combustion of C to CO₂ is -393.5 kJ/mol.

The enthalpy of formation (∆Hf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states at a given temperature and pressure.The enthalpy change can be expressed as: ΔH = ΣH(products) - ΣH(reactants)

The standard enthalpy of the formation of carbon dioxide (∆Hf°) is approximately -393.5 kJ/mol. However, the standard enthalpy of formation for carbon (∆Hf°) is zero, as it is in its elemental form.

ΔH = ∆Hf°(CO2) - ∆Hf°(C) - ∆Hf°(O2)

ΔH = (-393.5 kJ/mol) - (0 kJ/mol) - (0 kJ/mol)

ΔH = -393.5 kJ/mol

So, the enthalpy change for the reaction is approximately -393.5 kJ/mol.

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Calculate the mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm . How many liters of CO2 would be produced if there was only a 78% yield?

Answers

The mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm is 104.1 g

The volume of CO₂ produced with a 78% yield would be 19.7 L.

What mass of calcium carbonate must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm?

The mass of calcium carbonate that must be decomposed to produce 25.0 L of carbon dioxide gas at 26 °C and 0.997 atm is calculated from the equation of the reaction as follows:

The balanced equation of reaction: CaCO₃(s) → CaO(s) + CO₂(g)

The number of moles of CO₂ produced is determined from the ideal gas equation:

n = PV/RT

n = (0.997 atm) × (25.0 L) / [(0.0821 L·atm/(mol·K)) × (299 K)]

n = 1.04 mol CO₃

From the balanced equation;

1 mol of CaCO₃ produces 1 mol of CO₂.

Moles of CaCO₃₃required = 1.04 mol of CaCO3.

the mass of CaCO3 needed will be:

mass = 1.04 mol × 100.09 g/mol

mass = 104.1 g

If there is only a 78% yield, the actual moles of CO₂ produced would be:

moles = 0.78 × 1.04 mol

moles = 0.81 mol

solving for volume using the ideal gas equation:

V = nRT/P = (0.81 mol) × (0.0821 L·atm/(mol·K)) × (299 K) / (0.997 atm)

V = 19.7 L

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Calculate the molarity of 34.1 of MgS in 743 mL of solution.

Answers

Answer: 0.814 M MgS

Explanation:

I am assuming that 34.1 is in Grams if not this answer is propably not correct.

34.1 g MgS / 56.369 MgS(molar mass from Periodic table) = 0.605 moles

Molarity - moles / Liter

M= 0.605 / 0.743 Liter =0.814 M

Calculate The Number Of Moles Of Solute In 90.99 ML Of 0.1065 M K2Cr2O7(aq). (2024)

FAQs

Calculate The Number Of Moles Of Solute In 90.99 ML Of 0.1065 M K2Cr2O7(aq).? ›

Expert-Verified Answer

What is the number of moles of solute in 90.99 mL of 0.1065 M? ›

Expert-Verified Answer

We need to convert the volume from milliliters to liters before performing the calculation. Therefore, there are 0.009703635 moles of K2Cr2O7 in 90.99 mL of 0.1065 M K2Cr2O7(aq). This calculation tells us the amount of K2Cr2O7 in terms of moles, which is a measure of the number of particles.

How do you calculate the number of moles of solute in K2Cr2O7? ›

To calculate the number of moles of a solute in a solution, you multiply the molarity of the solution by its volume. Therefore, there are approximately 0.003353 moles of K2Cr2O7 in 26.73 mL of 0.1255 M K2Cr2O7(aq).

How do you calculate the number of moles of a solute present in? ›

This will represent your basic strategy - assuming you know what the solute is, always determine how much of it you have - its mass. n=C⋅Vsolution - with the volume and/or the molarity usually given.

How do you find the percent solute of a mole? ›

Multiplying the mole fraction by 100 yields the mole percentage of the given component. Mole Fraction = the number of moles of one ingredient in the given mixture the total number of moles in the mixture . As a result, Mole percent Equals Mole fraction x 100.

How many moles of K2Cr2O7 are required to reduce? ›

Therefore, 1 mole of Sn2+will reduce 13 moles of K2Cr2O7.

What is the formula mass of K2Cr2O7? ›

What is the formula for calculating moles? ›

To calculate the number of moles of any substance in the sample, we simply divide the given weight of the substance by its molar mass.

How to calculate the number of solutes? ›

There are several ways to determine the amount of solute in a solution. One method is using molarity (most often method used in chemistry). The equation for molarity is: Molarity = moles of solute/liters of solution.

What is the number of moles of solute in 250 mL of a 0.4 M solution? ›

Q9: What is the number of moles of solute in 250 mL of a 0.4 M solution? Answer: There are 0.1 moles of solute present in a 250 mL of 0.4 M solution.

How to find the number of moles of solution? ›

Number Of Moles Formula
  1. The formula for the number of moles formula is expressed as.
  2. Given.
  3. Number of moles formula is.
  4. Number of moles = Mass of substance / Mass of one mole.
  5. Number of moles = 95 / 86.94.

What is the number of moles of a solute called? ›

Molarity is defined as the number of moles of solute present in 1 litre of solution. It is represented by M. M= Number of moles of soluteVolume of solution in litres.

How many moles of solute are contained? ›

To find the number of moles of solute, you can use the formula:moles = Molarity (M) × Volume (L)Since the volume is given in milliliters, you'll need to convert it to liters by dividing by 1000:200 milliliters = 0.2 liters. Now, you can plug in the values:moles = 1 M × 0.2 L.

How many moles of solute are in 250 mL? ›

1 Answer. There are 0.1 moles of solute in 250 mL of 0.4 M solution.

How many moles of ethyl alcohol (C2H5OH) are present in 65 mL of a 1.5 m solution? ›

∴ in 65 ml of ethyl alcohol solution, 1.5/1000 × 65 = 0.0975 mol of ethyl alcohol. therefore the number of moles of ethyl alcohol is 0.0975.

What is the molarity of the solution if you dissolve 0.70 moles of HCl in enough water to prepare 250 mL of solution? ›

Recall that we have 0.70 moles of HCl in this volume of solution. Hence, the molarity of the solution is: 0.70 m o l 0.250 L = 2.8 m o l / L .

What is a measure of the number of moles of solute? ›

Molarity is a measure of the number of moles of a solute in one liter of a solution. Molarity is most often used when the solute is a solid and the solvent is a liquid. If you are given the mass of the solute, you can calculate its number of moles by checking the periodic table and finding the solute's molar mass.

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