Amount of Oxygen Used when cooking with CH4

Question

how many moles of O2 are used if there are 6.00 moles of CO2 produced in the chemical equation CH4 + 2O2 gives CO2 + 2H2O

Answer 1

First you want to make sure the equation is balanced -- which it already is.

CH₄ + 2 O₂ --> CO₂ + 2 H₂O

Question provides that 6.00 moles of CO₂ are produced.

Based on the coefficients of the reaction, for every mole of CO₂ that is produced, 2 moles of O₂ are used (reacted). So if 6.00 moles of CO₂ are produced, how many moles of O₂ are used? That's the answer.

For simplicity, I assume the question is asking how many moles of O₂ actually react -- could be the case that more is put into the reaction...in majority of cases the yield is not 100%.

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