Percent Composition

Front

What is percent composition?

Back

Percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of each 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?

Back

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

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon (C) is approximately 12.01 g/mol.

Front

What is the molar mass of oxygen (O)?

Back

The molar mass of oxygen (O) is approximately 16.00 g/mol.

Front

What is the molar mass of lithium (Li)?

Back

The molar mass of lithium (Li) is approximately 6.94 g/mol.

Front

What is the molar mass of phosphorus (P)?

Back

The molar mass of phosphorus (P) is approximately 30.97 g/mol.

Front

What is the molar mass of calcium (Ca)?

Back

The molar mass of calcium (Ca) is approximately 40.08 g/mol.

Front

Calculate the percent composition of lithium in lithium phosphide (Li3P).

Back

The percent composition of lithium in lithium phosphide (Li3P) is 40%.

Front

Calculate the percent composition of phosphorus in lithium phosphide (Li3P).

Back

The percent composition of phosphorus in lithium phosphide (Li3P) is 60%.

Front

Calculate the percent composition of nitrogen in calcium nitrate (Ca(NO3)2).

Back

The percent composition of nitrogen in calcium nitrate (Ca(NO3)2) is 17%.