How many moles are necessary to react completely with four moles of propane in the reaction #C_3H_8 + 5O_2 -> 3CO_2 + 4H_2O#?

1 Answer
Dr. Hayek
Feb 25, 2016

#20mol " of "O_2#

Explanation:

I assume that the question is about how many moles of oxygen that will react completely with four moles of propane.

From the balanced equation:

#C_3H_8+5O_2->3CO_2+4H_2O#

Every 1 mole of #C_3H_8# reacts with 5 moles of #O_2# , therefore,

#?molO_2=4cancel(molC_3H_8)xx(5molO_2)/(1cancel(molC_3H_8))=20 molO_2#

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