How many grams of oxygen are in 56 g of C₂H₂O₂? A)11 B)19 C)26 D)31 E)49

Question

Quizplus · Accepted Answer

The molar mass of C₂H₂O₂ is 62 g/mol. So, 56 g of C₂H₂O₂ is equal to 56 g / 62 g/mol = 0.9 mol. Each molecule of C₂H₂O₂ contains 2 atoms of oxygen. So, 0.9 mol of C₂H₂O₂ contains 0.9 mol * 2 atoms/molecule = 1.8 mol of oxygen. The molar mass of oxygen is 16 g/mol. So, 1.8 mol of oxygen is equal to 1.8 mol * 16 g/mol = 28.8 g.

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How Many Grams of Oxygen Are in 56 G of C₂H₂O₂