Molar Mass MCQ Questions and Answers: 

1. The molar mass of the carbonate ion is________

A. 60

B. 60g

C. 60g/cm3

D. 60g/mol

Answer: D

2. Which of the following statements is correct________

A. The mass of 1mol CO2 is 44g/mol

B. The molar mass of the aluminum ion is 27 g

C. The molar mass of H 2 O is 18 g/mol

D. The relative molecular mass of H is 2 g/mol

Answer: C

3. Which of the following statements is correct________

A. The molar mass of water is 18 g

B. The molar mass of water is 18g•mol -1

C. The mass of 1 mol of water is 18 g·mol -1

D. The amount of substance in 9g of water is 1mol

Answer: B

4. Which of the following statements is correct______

A. The molar mass of hydrogen is 2 g

B. A mole is the unit of mass of a substance

C. The mass of 1mol OH- is 17g

D. The volume occupied by 1mol of gas is about 22.4L

Answer: C

5. Which of the following statements is correct_________

A. The molar mass of CO2 is 44g

B. Under standard conditions, the volume occupied by 1molCO2 is about 22.4L

C. The mass of 1molN 2 is 14g

D. Dissolve 40g of NaOH in 1L of water, and the concentration of NaOH in the resulting solution is 1mol/L

Answer: B

6. Which of the following statements is correct________

A. The molar masses of sulfuric acid and phosphoric acid are equal

B. The molar mass is 6.02×10 23 times the mass of the substance

C. The molar mass of HNO3 is 63g

D. Molar mass is the formula quantity of a substance

Answer: A