the pressure of a `1 : 4` mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen ?

Options

A. `0.8 xx 10^(5) atm`
B. `0.008 Nm^(-2)`
C. `8 xx 10^(4) Nm^(-2)`
D. `0.25 atm`

Answer

C

Explanation

`(p_(O_(2)))/(p_("total")) = (n_(O_(2)))/(n)`
`p_(O_(2)) = 4/5 xx 1` atm
`= 0.8atm = 0.8 xx 101325 Nm^(-2)`
`= 8 xx 10^(4) Nm^(-2)`