If a sample of butane, C4H10, contains a total of 8.0 X 10^3 atoms of carbon, how many molecules of butane are in the sample?
8.0 X 10^3 atoms C * (1 formula unit C4H10 / 4 C atoms) * (6.022 X 10^23 C4H10 molecules / 1 formula unit C4H10) = 1.2 X 10^27 molecules C4H10
Is this correct?