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Questions and Answers
What is the mass percentage of benzene in the solution containing 30% by mass in CCl4?
What is the mass percentage of benzene in the solution containing 30% by mass in CCl4?
- 8.33%
- 25%
- 33.33%
- 18.75% (correct)
Express 15 ppm (by mass) of chloroform in percent by mass.
Express 15 ppm (by mass) of chloroform in percent by mass.
- 0.015%
- 0.15%
- 1.5%
- 0.0015% (correct)
Determine the molality of chloroform in the water sample given the level of contamination as 15 ppm (by mass).
Determine the molality of chloroform in the water sample given the level of contamination as 15 ppm (by mass).
- 0.001255 m
- 0.1255 m (correct)
- 12.55 m
- 1.255 m
Calculate the mole fraction of benzene in the solution containing 30% by mass in CCl4.
Calculate the mole fraction of benzene in the solution containing 30% by mass in CCl4.
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If a solution contains 20g of solute dissolved in 100g of solvent, what is the mass by volume percentage of the solution?
If a solution contains 20g of solute dissolved in 100g of solvent, what is the mass by volume percentage of the solution?
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