Percent Composition

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What is percent composition?

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Percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of the element by the total mass of the compound and multiplying by 100.

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How do you calculate the percent composition of an element in a compound?

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To calculate percent composition, use the formula: (mass of element in 1 mole of compound / molar mass of compound) x 100.

Front

What is the percent composition of sulfur in MgSO4 (gram formula mass = 120 g/mol)?

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27%.

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What is the percent composition of carbon in carbon monoxide (CO)?

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43%.

Front

What is the percent composition of oxygen in carbon monoxide (CO)?

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57%.

Front

Find the percent composition of magnesium in Mg3(PO4)2.

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27.48% Mg.

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What is the percent composition of copper in Cu2S?

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79.854% Cu.

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What is the percent composition of sulfur in Cu2S?

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20.145% S.

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What is the formula for calculating percent composition?

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Percent Composition = (mass of element / total mass of compound) x 100.

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Why is percent composition important in chemistry?

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Percent composition helps in understanding the composition of compounds, stoichiometry in reactions, and is essential for quantitative analysis.