Chemistry
posted by Simon on .
Find the volume, in L, of 100g gas mixture containing 10.0 mol% hydrogen in nitrogen at 30.0C and 5.00 atm. Use the avg molecular wt.
what is the molar concentration of hydrogen, in mol/L, in the gas mixture?
what is the average mass denisity in g/L

Avg molar mass H2+N2 where
H2 = 0.1 x 2g/mol = 0.2
N2 = 0.9 x 28g/mol = 25.2
Total = 25.4 g/mol.
Convert 100 g to mols using 25.4 as the molar mass of the mixture and solve for volume in PV = nRT. 
part 2.
total mols x 0.1 = mols H2.
molsH2/total volume = M
part 3.
density = g/L
22.4L for a mol of the gas has a mass of 25.4 g so 25.4/22.4 = density.