Question

3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a 1.12 litre flask at . The total pressure of the gas mixture will be

• A. 1 atm
• B. 4 atm
• C. 3 atm
• D. 2 atm

Answer 1

Answer: (B)

4 atm

Answer 2

3.2 g $O _ { 2 } = 0.1 \mathrm {~mol}$, 0.2 g$n = 0.2 \mathrm {~mol}$,

$P = \frac { n R T } { V } = \frac { 0.2 \times 0.082 \times 273 } { 1.12 } = 4 \mathrm {~atm}$