Molar Mass and Moles Calculations

This video tutorial explains how to convert grams to moles using various examples. It covers the concept of molar mass and demonstrates calculations for different substances, including carbon, calcium, silicon tetrafluoride, aluminum fluoride, and calcium phosphate. The tutorial provides step-by-step guidance on using conversion factors and highlights the importance of understanding chemical formulas and atomic masses.

What is the molar mass of carbon used for converting grams to moles?

• 6 grams per mole

• 18 grams per mole

• 12 grams per mole

• 24 grams per mole

If you have 30 grams of carbon, how many moles do you have?

• 3.0 moles

• 2.5 moles

• 1.5 moles

• 2.0 moles

What is the molar mass of calcium used in the conversion?

• 40.08 grams per mole

• 50.08 grams per mole

• 30.08 grams per mole

• 20.04 grams per mole

How many moles of calcium are in 20 grams of calcium?

• 0.699 moles

• 0.599 moles

• 0.499 moles

• 0.799 moles

What is the molar mass of silicon tetrafluoride?

• 94.09 grams per mole

• 104.09 grams per mole

• 114.09 grams per mole

• 124.09 grams per mole

How many moles of silicon atoms are in 150 grams of silicon tetrafluoride?

• 1.24 moles

• 1.34 moles

• 1.54 moles

• 1.44 moles

What is the chemical formula for aluminum fluoride?

• AlF4

• AlF3

• AlF2

• AlF

How many moles of fluorine atoms are in 320 grams of aluminum fluoride?

• 9.43 moles

• 10.43 moles

• 11.43 moles

• 12.43 moles

What is the molar mass of calcium phosphate?

• 310.18 grams per mole

• 300.18 grams per mole

• 290.18 grams per mole

• 320.18 grams per mole

How many moles of oxygen atoms are in 2.4 kilograms of calcium phosphate?

• 81.9 moles

• 61.9 moles

• 51.9 moles

• 71.9 moles