Use of amount of substance in relation to masses of pure substances

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Question 15
Medium

Depleted air from an industrial exhaust system contains 16% oxygen by volume. Calculate the volume of this depleted air, in dm3\text{dm}^3dm3, needed to provide enough oxygen to react completely with 3.20 dm3 of methane gas.

The balanced chemical equation for the combustion is:

CH4(g)+2O2(g)→CO2(g)+2H2O(g) \text{CH}_4\text{(g)} + 2\text{O}_2\text{(g)} \rightarrow \text{CO}_2\text{(g)} + 2\text{H}_2\text{O(g)} CH4​(g)+2O2​(g)→CO2​(g)+2H2​O(g)
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Use of amount of substance in relation to masses of pure substances Questions

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