Question

Four gases were combined in a gas cylinder with partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He. what is the total pressure inside the cylinder? What is the mole fraction of N2 in the mixture

Answer 1

p=p1+p2+p3+p4. p=3.5+2.8+0.25+0.15=6.9. mole fration of N2 =p1÷p=3.5÷6.9 =0.5