Kitty F.

asked • 11/07/14

How many moles of oxygen will burn?

In a particular reaction, 4.5 moles of heptane burn in the presence of oxygen.
C7H16 + 11O2 -> 7CO2 + 8H2O How many moles of oxygen will burn?
Carbon: 7
Hydrogen: 16
Oxygen:  22
Carbon:  7
Hydrogen:  16
Oxygen:  22

I'd like to understand HOW to arrive at the answer, not the answer by itself please.

Kitty F.

Why aren't we multiplying 4.5 moles of heptane by 22 moles of oxygen?  If we have 11O2 isn't that 22 moles of oxygen?


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