Question

1) 15 g of NaClis dissolved in 225g of water. What is the mass percent of NaCl in the solution?
2) Marco bought 15mL of kerosene and diluted it with 55 mL of water. What is the percent by volume of the water?
3) What is the percent by mass of a solution that contains 589 NaCl dissolved in 150 g of water?
4) What is the percent by volume of a 125 ml of liquid milk added to 450 ml of water?
5) A solution is made by adding 25 mL of benzene to 80 mL of toluene. What is the percent by volume of benzene?​

Answer 1

Answer:

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Answer 2

Given - Variable data about solution

To find - Mass percent and volume percent as per question

Solution - 1. Mass of solute : 15 gram

Mass of solvent : 225 gram

Mass of solution = 15 + 225

Mass of solution = 240 gram

Mass percent of solution = 15/240*100

Mass percent of NaCl in solution = 6.25%

2. Volume of solute : 15 ml

Volume of solvent : 55 ml

Volume of solution = 15 + 55

Volume of solution = 70 ml

Percent by volume of water = 55/70*100

Percent by volume of water = 78.57%

3. Mass of solute : 589 gram

Mass of solvent : 150 gram

Mass of solution = 589 + 150

Mass of solution = 739 gram

Mass percent of solution = 589/739*100

Mass percent of NaCl in solution = 79.7%

4. Volume of solute : 125 ml

Volume of solvent : 450 ml

Volume of solution = 125 + 450

Volume of solution = 575 ml

Percent by volume = 125/575*100

Percent by volume = 21.7%

5. Volume of benzene : 25 ml

Volume of toluene : 80 ml

Volume of solution = 25 + 80

Volume of solution = 105 ml

Percent by volume of benzene = 25/105*100

Percent by volume = 23.8%