Question

Compute the following sample problem
1. What is the concentration of an alcohol solution that was prepared by dissolving 20ml ethanol in 140ml of water?
2. What is the percent by mass of a solution containing 40 gram of sodium chloride dissolved in 60 ml of water?
3. What is the volume of water and ethanol in a 400ml of 20% aqueous solution of ethanol?
4. A sugar solution with a mass of 300 grams has a percent by mass concentration of 30% How much sugar is present in this solution if 240 gram of water is used?
5. What is the mass percent of solute when 4 gram is dissolved in 100ml. of water?

Answer 1

Answer:

sorry friend I don't know the answer

Explanation:

because I will not study well