What mass of oxygen is present in 10.0 grams of potassium nitrate (KNO₃)?

Name: What mass of oxygen is present in 10.0 grams of potassium nitrate (KNO 3 )?
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Quizplus · Accepted Answer

Potassium nitrate (KNO3) has a molar mass of approximately 101.1 g/mol (39.1 for K, 14.0 for N, and 48.0 for the three O atoms). The fraction of the mass due to oxygen is 48.0/101.1. For 10.0 g of KNO3, the mass of oxygen is (48.0/101.1) * 10.0 g = 4.75 g.

What Mass of Oxygen Is Present in 10