Question

2 H2(g)+O 2(g)--->2 H2O(g)if eight moles of hydrogen react how many of moles of water are produced and how many moles of oxygen are required

Answer 1

As shown in the equation the molar ratio of H2 to H20 is 1:1, therefore if 8 moles of H2 are used, 8 moles of H2O are produced. However the molar ratio of H2 to O2 is 2:1 therefore the number of moles of O2 required is 8/2 = 4.

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