tions: Read each questions carefully. Encircle the letter of the correct answer

1. What are the two different ways of expressing the percent concentration? a. Mole fraction and Molarity b. Percent by Mass and Percent by Volume c. Molality and Percent by Mass d. None of these

2. It is the ratio of the mass of solute to the mass of solution multiplied by 100% a Percent by mass b. Percent by volume C. Mole fraction d. Molarity
3. A tableya (solidified cocoa powder) called brand X is sold in a store. Its mass is 8 grams containing 5.2 grams cocoa powder. What is the percent by mass of cocoa powder? a. 45 % b. 55 % C. 65 % d. 75%
4. A minatamis na niyog or bukayo has a mass of 8.0 grams containing 1.9 grams sugar. What is the percent mass of sugar? a. 24% sugar b. 25% sugar c. 26%sugar d. 27% sugar
5. What is the total mass of tableya (solidified cocoa powder) containing 60% cocoa powder which is 35 grams cocoa powder? a. 54 grams tableya b. 56 grams tabrilla c. 58 grams tabrilla d. 60 grams tabrilla
6. It is the ratio of the volume of the solute to the volume of solution multiplied by 100 percent. a. Percent by mass b. Percent by volume c. Molarity d. Mole fraction
7. Mother prepared a refreshing lemon juice for her son. What is the volume of solute in a lemon extract solution if it has a volume of 100 mL containing 60% lemon extract? a 40 mL lemon extract b. 50 mL lemon extract c. 60 mL lemon extract d. 70 mL lemon extracted
8. You are asked to add 30 mg salt (NaCl) in 20 mL solution to a favorite adobo dish. This concentration is just enough to give your adobo a salty taste. Express this in percent concentration. (Note: 30 mg = 0.03 g) a. 0.15 % salt solution b. 0.20 % salt solution c. 0.25 % salt solution d. 0.30 % salt solution 9. A "10% NaCl solution" contains 10 g NaCl per a 100 mL water b. 100 mL solvent c. 100 mL solution d. 1000 mL solution
10. An alcohol called brand Y is used as disinfectant in hospitals. Its total volume is 100 mL containing 70 mL ethyl alcohol. What is the percentage by volume of ethyl alcohol? a. 60 % b. 70 % d. 90% C. 80 %​