Question

$32g$ of oxygen and $3g$ of hydrogen are mixed and kept in a vessel of $760mm$ pressure and $0^{o}C$. The total volume occupied by the mixture will be nearly:

• A. $22.4$ litres
• B. $33.6$ litres
• C. $56$ litres
• D. $44.8$ litres

Answer 1

The correct option is C $56$ litres

Ideal gas law is given by,

$PV=nRT$

where $P=760mmHg=1atm,V=?$

n=moles of $O_2$+mole of $H_2$

$=\frac{32}{32}+\frac{3}{2}$

$=2.5$moles

$V=\frac{nRT}{P}$

$=\frac{2.5\times 0.082\times 273}{1}$

$V=56L$

Option C is correct