What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 `dm^(3)` flask at `27 ^(@)C` ?

Explanation

Total no. of moles (n) present in the gaseous mixture
`=(3.2)/16 + (4.4)/44 = 0.3`
`( :. " mol. mass of " CH_4 = 16 " and mol. mass of " CO_2 = 44)`
According to the gas equation,
`PV = nRT`
`:. " " Pxx 9 = 0.3 xx 8.314 xx 10^3 xx 300`
`( :. R = 8.314 xx 10^3 " Pa " dm^3 k^(-1) mol^(-1)`)
or `P= (0.3 xx 8.314 xx 10^3 xx 300)/9`
`=8.314xx10^4 Pa`