Mole Practice
1. How many particles of gold are in 2.3 moles of Au?
2. Calculate the number of moles of O2 in 15.5 grams of O2. (MM O2 = 32 g/mol)
3. Calculate the mass in grams of 2.47 x 1021 formula units of sodium oxide.
(MM Na₂O = 62 g/mol)
X
4. Calculate the number of atoms of titanium in 23.4 Kg Ti. (MM Ti = 48 g/mol)
2 H₂ + O₂ -> 2 H₂O
5. How many grams of O₂ are needed to produce 75.0 grams of H₂O? (MM O₂ = 32 g/mol)
(MM H₂O = 18 g/mol)
6. How many grams of H₂ are needed to react with 75.0 grams of O₂? (MM H₂ = = 2 g/mol)
(MM O₂ = 32 g/mol)