Chemistry Help? A saturated aqueous solution of sodium bromide (NaBr) at 20 oC contains 116 grams of NaBr per

A saturated aqueous solution of sodium bromide (NaBr) at 20 oC contains 116 grams of NaBr per 100 grams of water. Express the concentration of this solution as percent by mass of NaBr.
Answer
a. 11.6%
b. 53.7%
c. 116%
d. 43.5%
e. 66.5%
Which of the following is likely to be soluble in carbon tetrachloride?
Answer
a. NaCl
b. KCl
c. C2H6
d. H2O
e. HF

How many grams of glucose (C6H12O6) would you need to prepare 2.0 liters of 2.0% glucose solution. The density of this solution is 1.08 g/mL.
Answer
a. 20 g
b. 40 g
c. 65 g
d. 43
e. 108 g

Carbon disulfide was once a widely used cleaning agent, which has now been found to be carcinogenic. Which of the following substances is least likely to dissolve in carbon disulfide?
Answer
a. C7H16
b. CCl4
c. KBr
d. CO2
e. C6H6
The physiologic saline solution used in hospitals is 0.90% NaCl (mass of NaCl per volume of the solution). What is its molarity?
Answer
a. 1.2 M
b. 0.87 M
c. 0.15 M
d. 3.2 M
e. 7.5 M

What is the molarity of a solution made by dissolving 2.0 moles of glucose(C 6H12O6) in enough water to give 6.6 liters of the solution?
Answer
a. 2.0 M
b. 0.30 M
c. 6.6 M
d. 3.3 M
e. 0.85 M

A solution is prepared by dissolving 8.75 grams of sodium chloride in enough volume of water to produce 112.0 grams of the NaCl solution, what is the percent by mass of the solution?
Answer
a. 8.75%
b. 8.12%
c. 85.4%
d. 7.81%
e. 12.5%

How many moles of solute are present in 1.5 liters of 1.33 M of Na2SO4?
Answer
a. 1.1 moles
b. 1.8 moles
c. 2.4 moles
d. 1.5 moles
e. 2.0 moles
Which of the following statements is incorrect?
Answer
a. Both compounds and solutions are homogeneous.
b. Both compounds and solutions can be separated by physical means.
c. Compounds have constant properties, but solutions have variable properties.