How many grams of O2 are required to burn 46.0 grams of C5H12?

Answer 1

Wondering what "burn" means....

If you mean this reaction...

C5H12 + 8O2 >>>5CO2 + 6H2O

Then eight moles of O2 are required to combust one mole of Pentane. So how many moles of Pentane do you have in 46grams?

Answer 2

Here is a worked example of s stoichiometry problem. http://www.jiskha.com/science/chemistry/stoichiometry.html

Answer 3

21