Question: How many moles in 28 grams of CO₂?

Answer: Molar Mass (grams) of CO₂:

1C = 1 x 12.01g = 12.01g

2O = 2 x 16.00g = 32.00g =

44.0g/mol

28g CO₂ x (1mol/44.0g) = 0.64 mol CO₂

Question: What is the mass of 5 moles of Fe₂O₃?

Answer: 800g Fe₂O₃

Question: Find the number of moles in Argon in 452g of Argon.

Answer: 11.3mol Ar

Question: Find the grams in 1.26 x 10⁻⁴ mol of HC₂H₃O₂.

Answer: 7.56 x 10⁻³g HC₂H₃O₂

Question: Find the mass in 2.6mol of Lithium Bromide.

Answer: 225.9g LiBr