8C 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 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?

Back

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?

Back

27%.

Front

What is the percent composition of carbon and hydrogen in benzene (C6H6)?

Back

C = 92.2%, H = 7.8%.

Front

What is the percent composition of sodium in NaCl?

Back

39%.

Front

What is the percent composition of nitrogen in calcium nitrate (Ca(NO3)2)?

Back

17%.

Front

What is the molar mass of MgSO4?

Back

120 g/mol.

Front

What is the molar mass of benzene (C6H6)?

Back

78 g/mol.

Front

What is the molar mass of NaCl?

Back

58.5 g/mol.

Front

What is the molar mass of calcium nitrate (Ca(NO3)2)?

Back

164 g/mol.