Homework Help: Chemistry

Posted by Simon on Thursday, July 26, 2012 at 4:19pm.

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

Chemistry - DrBob222, Thursday, July 26, 2012 at 5:02pm
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.
Chemistry - DrBob222, Thursday, July 26, 2012 at 5:09pm
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.

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