% mass/volume and mole fraction 11-01

Determine the mole fraction of SOLUTE in a solution with 2 moles of acetic acid C₂H₄O₂ and 2 moles of water.

• .5
• .25
• 1
• .2

If the percent by volume is 2.0% and the volume of solution is 250 mL, what is the volume of solute in solution?

• 0.5 mL
• 1.25 mL
• 5.0 mL
• 12.5 mL

If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in the solution?

• 8.0 g
• 50 g
• 80 g
• 800 g

What mass of solute is needed to make 75.0 g of a 3.4% solution?

• 2.55 g
• 22 g
• 0.05 g

What is the volume of solution needed to make a 3.5% by volume solution using 2.0mL of solute?

• 57 mL
• 0.57 mL
• 7 mL

What is the mole fraction of ethanol when 0.504 mol of ethanol are mixed with 4.06 mol of water?

• 0.110
• 0.124
• 0.097

What is the mole fraction of water when 0.504 mol of ethanol are mixed with 4.06 mol of water?

• 0.110
• 0.124
• 0.097
• 0.89

Calculate the mole fraction of benzene (C₆H₆) in a solution of 46.8 g benzene and 36.8 g of toluene (C₇H₈).

• 0.404
• 0.596
• 0.712
• 0.312

Calculate the mole fraction of toluene in a solution of 46.8 g benzene (C₆H₆) and 36.8 g of toluene (C₇H₈).

• 0.404
• 0.596
• 0.712
• 0.312

Calculate mol fraction of H₂O in 1.33 molal NaOH solution.

• 0.56
• 0.76
• 0.98
• 0.02