Answer to Question #328861 in General Chemistry for Tesha

Question

1. What is the percent by mass concentration of 41.0 g of sodium chloride

(NaCl) dissolved in 331 g of water (H2O)?

2. What is the percent by volume concentration of 25 ml ethanol (C2H5OH) in

75 ml solution?

3. What is the mass in grams of potassium nitrate (KNO3) needed to prepare

650 ml of 3.2 M KNO3 solution?

4. What is the molal concentration of a solution that contains 16 g of silver

nitrate (AgNO3) in 80 ml of water.

5. What is the molarity of 15.2 % by mass hydrogen peroxide (H2O2)? The

density of the solution is 1.01 g/ml.

Answer 1

1. 11 %

2. 33 %

3. 210.1 g

4. 1.17 mole/kg

5. 4.51 M