What is the mass percent of oxygen in CH₄O? (to 2 significant figures)

Question

Quizplus · Accepted Answer

To find the mass percent of oxygen, we need to determine the total molar mass of the compound and the molar mass of the oxygen atoms present. The molar mass of CH₄O can be calculated as: (12.011 + 1.008 + 32.066 + 1.008 + 10.811 + 1.008 + 15.999) g/mol = 73.911 g/mol The molar mass of oxygen is 15.999 g/mol. Therefore, the mass percent of oxygen can be calculated as: (molar mass of O / molar mass of CH₄O) x 100% = (15.999 g/mol / 73.911 g/mol) x 100% = 21.65% Therefore, none of the answer choices are correct.

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What Is the Mass Percent of Oxygen in CH₄O