[thatwascryptic]

What mass of a sample that is 98.0 % sulfur would be required in the production of 75.0 kg of H2SO4 by the following reaction sequence?         
S8  +  8 O2   ------->    8 SO2
2 SO2  +  O2   ------->    2 SO3
SO3  +  H2O   ------->   H2SO4           

I'm just confused on how to apply the 98% of sulfur to each of the equations.  Thanks for any feedback!

[Hunter2]

Simple Mathematics.  You have to look how many sulfur atoms in one sulfuric molecule. If you know this then you can calculate how many molecules you can make from S₈.

You have to calculate the mole of the sulfuric given by the mass.

[AWK]

This gives you mass of pure sulfur.

http://www.kwantlen.bc.ca/science/chemistry/chem1094/surrsup/stoichiometry.pdf - part 3