Question

The minimum molar mass of a compound containing $3.2 \%$ oxygen by mass is

(A) $1000 \mathrm{~g}$

(B) $500 \mathrm{~g}$

(C) $2000 \mathrm{~g}$

(D) Cannot be determined

Answer 1

$\frac{\text { Min mass of oxygen }}{\text { Mass of compound }} \times 100=32$

$\frac{16}{\text { Mot mass of compound }} \times 100=3.2$

Minimum molecular mass of compound $=500 \mathrm{~g}$.

Therefore, The option will be (B)