Percent Composition

Front

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.

Front

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 bromine in magnesium bromide (MgBr2)?

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87%.

Front

What is the percent composition of magnesium in magnesium oxide (MgO)?

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60%.

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

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43%.

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What is the percent composition of magnesium in magnesium bromide (MgBr2)?

Back

13%.

Front

What is the percent composition of magnesium in magnesium phosphate (Mg3(PO4)2)?

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27.48%.

Front

What is the molar mass of magnesium (Mg)?

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24.31 g/mol.

Front

What is the molar mass of bromine (Br)?

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79.90 g/mol.

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What is the molar mass of oxygen (O)?

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16.00 g/mol.