Calculating Gram Formula Mass and Composition

This video tutorial by Camille Castleberry explains how to calculate gram formula mass and percent composition of compounds. It provides step-by-step instructions and examples using sodium bicarbonate and sucrose. The tutorial covers the basic definitions, calculation steps, and examples to illustrate the concepts, helping viewers understand how to determine the mass and composition of elements in a compound.

What is the basic definition of gram formula mass?

• The volume of a compound in liters.

• The density of a compound in grams per liter.

• The percentage of each element in a compound.

• The sum of atomic masses of elements in a compound.

What is the first step in calculating gram formula mass?

• Write down the formula of the compound.

• Add the atomic masses.

• Multiply the atomic masses.

• Find the percentage composition.

In the example of sodium bicarbonate, what is the total gram formula mass?

• 24.022 grams per mole

• 342.297 grams per mole

• 168.012 grams per mole

• 45.98 grams per mole

What is the formula for sucrose?

• C6H12O6

• C12H22O11

• NaHCO3

• H2O

What is the gram formula mass of sucrose?

• 168.012 grams per mole

• 342.297 grams per mole

• 175.989 grams per mole

• 144.132 grams per mole

What does percent composition represent?

• The volume of a compound.

• The total mass of a compound.

• The density of a compound.

• The percentage of each element in a compound.

What is the final step in calculating percent composition?

• Divide by the number of atoms.

• Add the atomic masses.

• Multiply by 100.

• Subtract the atomic masses.

In the example of sodium bicarbonate, what is the percent composition of carbon?

• 0.142977%

• 24.022%

• 51.4%

• 14.3%

What is the percent composition of oxygen in sucrose?

• 175.989%

• 22.176%

• 14.3%

• 51.4%

Which step is unique to calculating percent composition compared to gram formula mass?

• Divide the element's total atomic mass by the gram formula mass.

• Multiply the atomic masses.

• Write down the formula of the compound.

• Add the atomic masses.