Question

#1: Martha has a large amount of 1.25 M H2SO4 in her lab. She needs 36 grams of H2SO4 for a chemical reaction she wants to perform. How many liters of the solution should she use?

A. 2.9 L

B. 5.8 L

C. 0.58 L

D. 0.29 L

***my answer: D. 0.29 L

is that right? @chmvijay :)

Answer 1

#2: A solution is prepared from 8 grams of acetic acid (CH2CO2H) and 725 grams of water. What is the molality of this solution?

A. 0.19 m

B. 0.09 m

C. 0.36 m

D. 0.54 m

**my answer: A. 0.19 m

is that correct?

Answer 2

#3: A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

A. 0.38

B. 0.40

C. 0.45

D. 0.62

**my answer: A. 0.38

is that correct? :)

Answer 3

#4: A solution must be at a lower temperature than a pure solvent to freeze. What colligative property can be employed to achieve this?

A. boiling-point elevation

B. vapor-pressure lowering

C. freezing-point depression

***my answer: C. freezing-point depression

is that it?

Answer 4

#5: Which of the following will dissolve most slowly?

A. a tablespoon of coarse sugar

B. two sugar cubes

C. a tablespoon of ultrafine sugar

D. a tablespoon of table sugar

***my answer: B. two sugar cubes

is that right?