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5 April, 20:41

How many grams of oxygen are in 56 g of c2h2o2?

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  1. 5 April, 22:09
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    First, find percent of oxygen: atom/molecule ... there are 2 atoms of Oxygen so: O2/C2H2O2 which is: 32g O2 / 58g C2H2O2 = 32/58.

    Next, multiply this by the total mass (56g C2H2O2) and the units will cancel out (g*g/g - > g) leaving you with the mass of Oxygen:

    56g C2H2O2 * 32g O2/58g C2H2O2 = 56*32/58 = 31g
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