Question

The mass of Hydrogen at S.T.P. that is present in a vessel which can hold 4 grams of oxygen under similar conditions is

• A. 1 gram
• B. 0.5 gram
• C. 0.25 gram
• D. 0.125 gram

Answer 1

The correct option is C

0.25 gram

$2gm$ of $H_2$ $\to$ $32gm$ of $O_2$

$1mole$ of $O_2$ $\to$ $1mole$ of $H_2$

$4g$ of $O_2$ $\to$ $\frac{1}{8}mole$

$\frac{1}{8}mole{H}_2$ = $0.25g$