Percent Composition

Multiple Choice

Percent composition is calculated by dividing the total molar mass of the element by the total ___ of the compound and multiplying by 100.

• molar mass
• avogadro's constant

• 22.4 L

• 6.02x10^23

Multiple Select

Which of the following steps are steps to calculating percent composition?

• Find the molar mass of an element

• Divide the molar mass of an element by molar mass of the compound/formula unit

• Check for 100%

Multiple Choice

Which element has the highest percent composition in H2O?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon