Question

The weight of a molecule of the compound C60H22 is :

• A. 1.09 × 10–21 g
• B. 1.24 × 10–21 g
• C. 5.025 × 10–23 g
• D. 16.023 × 10–23 g

Answer 1

Answer: (B)

1.24 × 10–21 g

Answer 2

Gram mol. wt. of C60H22 = 742 gm

i.e. wt. of 6.023 × 1023 molecules = 742

so wt. of 1 molecules $= \frac{742}{6.023 \times 10^{23}} = 1.24 \times 10^{- 21}$ gm.