3.2 g of oxygen (At. wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a `1.12 L` flask at `0^(@)C`. The total pressure of the gas mixture will be

Options

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

Answer

b

Explanation

`P_(O_(2)) = (n_(O_(2))RT)/(V_(O_(2))) = (3.2 xx 0.0821 x 273)/(32 xx 1.12)`
`= 2 atm`
`P_(O_(2)) = (n_(H_(2))RT)/(V_(H_(2))) = (0.1 xx 0.0821 xx 273)/(2 xx 1.2)`
`= 2` atm
Total pressure `= 2 + 2 = 4` atm