• question_answer One gram of oxygen at NTP occupies a volume of A)  0.7 L             B)  2.8 LC)  1.4 L             D)  3.5 L

1 mole of substance $\equiv$ Its molecular mass. $\equiv \,22.41\,L$ $32\,g$of ${{O}_{2}}=22.41\,L$ (molecular mass of${{O}_{2}}=32$) $\Rightarrow$1 g of Oxygen $=\frac{22.4}{32}$ Hence, the correct option is [a].