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

Front

What is the percent composition of Cl in HClO3?

Back

The percent composition of Cl in HClO3 is approximately 42%.

Front

In the compound Li3P, which element has a greater percent composition?

Back

Phosphorus has a greater percent composition than lithium in Li3P.

Front

What is the percent composition of bromine in MgBr2?

Back

The percent composition of bromine in MgBr2 is 87%.

Front

How do you find the total atomic mass of a compound?

Back

To find the total atomic mass of a compound, sum the atomic masses of all the atoms present in the chemical formula.

Front

What is the formula for calculating the percent composition of a compound?

Back

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

Front

What is the percent composition of OH- in Ca(OH)2?

Back

The percent composition of OH- in Ca(OH)2 is approximately 45.9%.

Front

How do you determine which element contributes more to the mass of a compound?

Back

Compare the total mass contributions of each element based on their quantities and atomic masses in the compound.

Front

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

Back

The percent composition of magnesium in Mg3(PO4)2 is approximately 27.48%.