Molar Mass of Aluminum Sulfate

The video tutorial explains how to calculate the molar mass of aluminum sulfate (Al2(SO4)3). It begins by identifying the atomic masses of aluminum, sulfur, and oxygen. The tutorial then demonstrates how to add these atomic masses and multiply by the subscripts, paying special attention to the parentheses in the chemical formula. The final molar mass is calculated to be 342.14 grams per mole.

What is the atomic mass of aluminum used in the calculation of aluminum sulfate's molar mass?

• 64.00

• 32.06

• 26.98

• 16.00

Which element in aluminum sulfate has an atomic mass of 32.06?

• Aluminum

• Sulfur

• Oxygen

• Hydrogen

Why is it important to pay attention to parentheses when calculating the molar mass of Al2(SO4)3?

• They are used to balance the equation.

• They indicate the number of molecules.

• They show the total mass of the compound.

• They group elements that need to be multiplied together.

How many oxygen atoms are considered in the calculation of the molar mass of Al2(SO4)3?

• 16

• 8

• 4

• 12

What is the result of multiplying the sum within the parentheses by 3 in the calculation?

• 342.14

• 96.06

• 53.96

• 64.00

What are the units of the final molar mass of aluminum sulfate?

• moles per gram

• grams per mole

• moles

• grams