Question

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

(1) 3 : 8

(2) 3 : 16

(3) 16 : 3

(4) 8 : 3

Answer 1

PV = nRT

400 × 10³ × 500 × 10^–6 \(=n\left(\frac{25}{3}\right)(300)\)