
Katherine B. answered 04/08/21
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The first step is to determine the ratio of moles of O2 to H2O. Since the equation is balanced, the ratio is 1 mole of oxygen to every 2 of H2O.
The next step is finding out how much oxygen you're starting with in terms of moles. There are 15.998 grams of oxygen per mole according to the molar mass.
160.0 g O2 x 1 mole O2 = 10.001 moles O2
15.998 g
Since the ratio of O2 to H2O is 1:2, the moles of O2 multiplied by 2 will give you the answer.
10.001 moles O2 x 2 = 20.002 moles H2O