Mole Fraction Quiz 3

Created by

Kamran Fateh

Mole fraction

Mole fraction quiz 3

Mole fraction is a dimensionless quantity that represents the ratio of the number of moles of a component to the total moles in a mixture. It is commonly used in chemistry to express the concentration of substances in a solution or a gas mixture. Unlike molarity or molality, mole fraction does not depend on temperature or pressure, making it useful for various calculations, including partial pressures in gas mixtures.

1 / 5

1) What is the mole fraction of solute in a solution where the vapor pressure of solvent decreases by 20% due to the solute? (Assume ideal solution behavior.)

0.2

0.25

0.50

0.75

2 / 5

2) When mole fraction of solute in a solution increases, what happens to the mole fraction of solvent?

It remains the same

It decreases

It increases

It doubles

3 / 5

3) If 0.5 mole of acetic acid is mixed with 0.5 mole of water, what is the mole fraction of acetic acid?

0.5

0.25

0.75

4 / 5

4) In a mixture of gases, the mole fraction of hydrogen gas is 0.6. What is the partial pressure of hydrogen if the total pressure is 500 kPa?

300 kPa

200 kPa

100 kPa

500 kPa

5 / 5

5) A solution is prepared by dissolving 3 moles of glucose in 7 moles of water. If the mole fraction of water is doubled, what would be the new mole fraction of glucose?

0.3

0.5

0.7

Cannot be determined

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