Calculating Molar Mass of Compounds

The video tutorial explains the concept of molar mass, defining it as the mass of one mole of a substance, typically measured in grams per mole. It demonstrates how to calculate the molar mass of a compound by summing the molar masses of its constituent elements, using the periodic table for reference. The tutorial provides a detailed example with the compound Al2(CO3)3, showing step-by-step calculations. It concludes with a practice problem involving the compound Be(OH)2, encouraging viewers to apply the learned method.

What is the definition of molar mass?

• The number of atoms in one mole of a substance

• The volume of one mole of a substance

• The density of one mole of a substance

• The mass of one mole of any substance

Where can you find the molar mass of an element?

• In a chemistry textbook

• On the periodic table

• In a laboratory manual

• In a scientific journal

What are the units for molar mass?

• Grams per liter

• Moles per gram

• Grams per mole

• Liters per mole

How do you calculate the molar mass of a compound?

• By adding the molar masses of each element

• By multiplying the molar masses of each element

• By subtracting the molar masses of each element

• By dividing the molar masses of each element

What is the molar mass of aluminum (Al)?

• 12 grams per mole

• 16 grams per mole

• 54 grams per mole

• 27 grams per mole

How many oxygen atoms are in the compound Al2(CO3)3?

• 6

• 3

• 12

• 9

What is the total mass of carbon in Al2(CO3)3?

• 48 grams

• 12 grams

• 24 grams

• 36 grams

What is the final molar mass of Al2(CO3)3?

• 144 grams per mole

• 180 grams per mole

• 234 grams per mole

• 270 grams per mole

How many oxygen atoms are in Be(OH)2?

• 1

• 2

• 4

• 3

What is the molar mass of Be(OH)2?

• 52.02 grams per mole

• 26.02 grams per mole

• 34.02 grams per mole

• 43.02 grams per mole