Methane (CH4) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is:

Question

CH4 + 2 O2 -> CO2 + 2 H2O
What volume of carbon dioxide is produced when 3.2 L of oxygen are consumed?

Answer 1

When only gases are considered, one can take a shortcut and use volume directly without going through mols.
3.2 L O2 x (1 mol CO2/2 mol O2) = 1.6 L CO2 produced.

Answer 2

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