Lesson: Molar Mass and Percent Composition

Lesson: Molar Mass and Percent Composition

By William Lovering

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What is the percent composition of nitrogen in AgNO₃ (round to whole %)

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What is the percent composition of hydrogen in H₂SO₄

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What is the percent composition of iron in iron (II) sulfide?

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A sample of the black mineral hematite, an oxide of iron found in many iron ores, contains 34.97 g of iron and 15.03 g of oxygen. What is the empirical formula of hematite?

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The bacterial fermentation of grain to produce ethanol forms a gas with a percent composition of 27.29% C and 72.71% O. What is the empirical formula for this gas?

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What is the empirical formula of a compound containing 40.0% C, 6.71% H, and 53.28% O?

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Empirical formula =BH₃

Molar mass =27.7g/mol

What is the molecular formula?