A sample is composed of 2.78 g iron and 1.19 g oxygen. The empirical formula is ________.

Name: A sample is composed of 2.78 g iron and 1.19 g oxygen. The empirical formula is ________.
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Quizplus · Accepted Answer

To find the empirical formula, convert the masses to moles: 2.78 g Fe / 55.85 g/mol = 0.0498 mol Fe and 1.19 g O / 16.00 g/mol = 0.0744 mol O. The mole ratio is approximately 2:3, giving the empirical formula Fe₂O₃.

A Sample Is Composed of 2