Posted by Jarred on Thursday, August 5, 2010 at 10:21am.
Write the balanced equation. I will be happy to critique your work.
C3H8+5O2---->3CO2+4H2O
Which shows that for each mole of propane, one gets 4 moles of water.
You have 5 moles of propane, so you get xxx moles of water.
For each mole of water, you have avagradro's number of molecules. So you have YYYY molecules of water.
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