A mixture of hydrogen and oxygen has volume 500 cm 3, temperature 300 K, pressure 400 kPa and mass 0.76 g. The ratio of masses of oxygen to hydrogen will be :

Question

A mixture of hydrogen and oxygen has volume 500 cm 3, temperature 300 K, pressure 400 kPa and mass 0.76 g. The ratio of masses of oxygen to hydrogen will be : (A) 3: 8 (B) 3: 16 (C) 16: 3 (D) 8: 3

Tardigrade Admin · Accepted Answer

P V=n R T 400 × 103 × 500 × 10-6=n((25/3))(300) n=(2/25) n=n1+n2 (2/25)=(M1/2)+(M2/32) Also M 1+ M 2=0.76 gm ( M 2/ M 1)=(16/3)

Q. A mixture of hydrogen and oxygen has volume $500 c m^{3}$ , temperature $300 K$ , pressure $400 k P a$ and mass $0.76 g$ . The ratio of masses of oxygen to hydrogen will be :

$3 : 8$

$3 : 16$

$16 : 3$

$8 : 3$

$P V = n RT$
$400 \times 1 0^{3} \times 500 \times 1 0^{- 6} = n (\frac{25}{3}) (300)$
$n = \frac{2}{25}$
$n = n_{1} + n_{2}$
$\frac{2}{25} = \frac{M _{1}}{2} + \frac{M _{2}}{32}$
Also $M_{1} + M_{2} = 0.76 g m$
$\frac{M _{2}}{M _{1}} = \frac{16}{3}$

Q. A mixture of hydrogen and oxygen has volume 500cm3, temperature 300K, pressure 400kPa and mass 0.76g. The ratio of masses of oxygen to hydrogen will be :

3:8

3:16

16:3

8:3