1.Your Science Teacher ask you to prepare a salt solution by dissolving a 2.25 g of table salt in 7.25 g of water. What is the mass of your solute?
a.) 1.2.25 grams b.)7.25 grams c.)9.5 grams
2.Your Science Teacher ask you to prepare a salt solution by dissolving a 2.25 g of table salt in 7.25 g of water. What is the mass of your solution?
a.) 1.2.25 grams b.)7.25 grams c.)9.5 grams
3.What is the % concentration by mass of 85 grams of sucrose dissolved in a 165 grams of water?
a.)52 grams b.) 52 % c.) 34 grams d.) 34 %
4.What is the percentage concentration in the following solution given that 5g sucrose in 90g water?
a.) 4 % b.) 5 % c.) 6 % d.) 7 %
5.What is the percent by volume of isopropanol in a 90 mL solution that contains 25 mL isopropanol?
a.) 21.7 % b.) 21.8 % c.) 27.7 % d.) 27.8 %
6.What is the volume of a 20 % methyl solution that contains 15 mL of methyl?
a.) 75 mL b.)0.75 mL c.) 75 %
7.What is the percent by mass concentration of a solution that contains 30.0 g of sugar dissolved in 150 g of water?
a. 20 %
b. 5 %
c. 17 %
8.A solution of benzene and toluene was prepared by adding toluene to benzene until the total volume becomes 135 mL. By volume, the solution is 30.0 % benzene. How much benzene, in mL, is in the solution?
a. 22.2 mL
b. 22.2 %
c. 40.5 mL
d. 40.5 %
9.What is the percent by mass concentration of a solution that contains 6.0 g of sugar dissolved in 20.7 g of water?
a. 29 mL
b. 29 %
c. 22 mL
d. 22 %
10. Brass is a copper-zinc alloy. if the concentration of zinc is relatively low, the brass has a golden color and is often used for inexpensive jewelry. If a 35.0 g pendant contains 1.7 g of zinc, what is the % by mass of zinc in brass?
a. 4.6 %
b. 4.7 %
c. 4.8 %
d. 4.9 %
11.A solution is prepared by mixing a 20 g of sodium chloride in 80g of water. I. Solute: 80%; Solvent 20% II. Solute: 20%; Solvent 80% Which statement/s is/are correct?
a. I only
b. II only
c. Both
d. None
12.How many grams of glucose are needed to prepare 500 mL of 5% glucose solution?
a. 2.5 grams
b. 25 grams
c. 10,000 grams
d. 1 gram
13.If you need to produce a 300 grams of a 9.5% saline solution, how many grams of salt would you use to form the solution?
a. 2.85 grams
b. 28.5 grams
c. 3.17 grams
14.If you need to produce a 300 grams of a 9.5% saline solution, how many grams of salt would you use to form the solution?
15.If you need to produce a 300 grams of a 9.5% saline solution, how many grams of water would you use to form the solution?
a. 297.15 grams
b. 271.5 grams
c. 296.83 grams
pls answer thoroughly i don't need guesses pls hehe
