2022 Easy
Single Choice
Marks: 4.00 / −1.00
The molar mass of \( \text{NaCl} \) is approximately (Na = 23, Cl = 35.5):
- A. \( 58.5\,\text{g/mol} \)
- B. \( 23\,\text{g/mol} \)
- C. \( 35.5\,\text{g/mol} \)
- D. \( 74.5\,\text{g/mol} \)
Correct Option:
- A. \( 58.5\,\text{g/mol} \) ✓ Correct
- B. \( 23\,\text{g/mol} \)
- C. \( 35.5\,\text{g/mol} \)
- D. \( 74.5\,\text{g/mol} \)
Hint: Add atomic masses of Na and Cl.
Solution:
\( M(\text{NaCl}) = 23 + 35.5 = 58.5\,\text{g/mol} \)
mole-concept
molar-mass