Name: Date:
Moles
About Chemistry http://chemistry.about.com
Avagadro’s Number = 6.02 x 1023 atoms/mol
1 mol of a gas at STP occupies 22.4 L
1. How many atoms of Oxygen are there in 18g of water?
2. How many atoms of Hydrogen are there in 18g of water?
3. How many molecules of H2O are there in 18g of water?
4. What is the mass of 1 mole of O2?
5. What is the mass of 1 molecule of O2?
6. What is the mass of 2 mol of H2SO4?
7. What is the density of O2 at STP?
8. 3 L of a gas weighs 2 g. What is the molecular mass?
9. What volume does 22g of CO2 at STP occupy?
10. How many atoms of Hydrogen are in 67.2 L of H2 at STP?
