# CHEMISTRY

2H2S + 3O2 → 2H2O +2SO2 given the balanced equation, if 4 moles of hydrogen sulfide react:

How many moles of oxygen consumed?
How many moles of water and sulfur dioxide are produced?

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4 mol H2S x (3 mols O2/2 mols H2S) = 4*3/2 ?
Note how the factor in parentheses converts mols H2S to mols Oxygen. For H2O it works this way.

4 mols H2S x (2 mols H2O/2 mols H2S) = 4*2/2 = ?
See the mols H2S on the bottom cancels with H2S in the numerator and leaves the unit you want to convert to.
Now you do the last one.

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2. the first one comes 6
the second becomes 4
just i think.................!

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3. This should be the answer...

Moles of Sulfur Dioxide:
4 mol H2S x (S mol SO2/2mol H2S) = 4*2/2=?

Ans: 4 mol SO2

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