J.R. S. answered • 02/06/18
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2H2 + O2 ==> 2H2O balanced equation. Note ratio of 2 H2 to 1 O2. Also note ratio of 2 H2 to 2 H2O.
volume of H2 needed to react with 82 volumes of O2 = 82 O2 x 2 H2/1 O2 = 164 volume. YOU HAVE ONLY 56 VOLUMES.
Since H2 is limiting, the amount of water is determined by the volume of H2. And since the ratio of H2 to H2O is 1:1, the volume of H2O produced is the same as the volume of H2 used.
volume of H2O produced = 56 volumes H2 x 1 volume H2O/1 volume H2 = 56 volumes H2O produced
