The mass percentage in composition of dry air at sea level contains approximately 75.5% of `N_2` IF the atmospheric pressure is 1atm, then what will be the partial pressure of nitrogen

Explanation

Mole fraction of nitrogen =`(Mass of nitrog en)/( Mol ecular weight) `
`mu_1=(0.755 times 29)/28=0.78`
Partial pressure of nitrogen `P_1=mu_1 ((RT)/V)`
`=mu_1/mu((muRT)/V)=mu_1/muP=0.78 times 1=0.78atm`