Chemistry
200 cm3 of hydrogen and 150 cm3 of oxygen are mixed and ignited, as per the following reaction,
2H2 + O2 ⟶ 2H2O
What volume of oxygen remains unreacted?
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Answer
2 Vol. of hydrogen reacts with 1 Vol. of oxygen
∴ 200 cm3 of hydrogen reacts with = x 200 = 100 cm3 of oxygen.
Hence, unreacted oxygen is 150 - 100 = 50cm3
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