2021 Medium
Multiple Choice
Marks: 4.00 / −2.00
Which of the following statements about the mole concept are correct? Select all that apply.
- A. One mole contains \( 6.022 \times 10^{23} \) particles
- B. Molar mass is expressed in kg/mol
- C. Molar mass numerically equals molecular weight in g/mol
- D. One mole of any gas at STP occupies 22.4 L
Correct Options:
- A. One mole contains \( 6.022 \times 10^{23} \) particles ✓ Correct
- B. Molar mass is expressed in kg/mol
- C. Molar mass numerically equals molecular weight in g/mol ✓ Correct
- D. One mole of any gas at STP occupies 22.4 L ✓ Correct
Hint: Recall the definitions of mole, Avogadro's number, and molar mass.
Solution:
One mole contains \( 6.022 \times 10^{23} \) particles; molar mass equals mass per mole in g/mol; both statements are correct.
mole-concept
avogadro