Question

The weight of a molecule of the compound $C_{60}{H}_{122}$ is $(a\times 10^{-23})$ grams. Approximate value o f $‘a’$ is

• A. $140$
• B. $842$
• C. $60$
• D. $80$

Answer 1

Answer: (B)

Molecular weight of $C_{60}{H}_{122}=842g$
$6.023\times 10^{23}$ molecules weigh $842g$
$1$ molecule weighs $=\frac{842}{6.02\times 10^{23}}g$