1 Mole 6 02 10 23 atoms molecules ions Molecular weight Mw Molar Mass Atomic weight C 12 0 g mol Grams moles atoms molecules ions Ex 20 0 g C how many moles 20 0 g C 1 mol 12 0 g 1 66 moles ex 3 00 moles of Li2CO3 how many grams 3 00 moles Li2Co3 73 9 g mol 221 7 g 222 g Li2CO3 How many molecules are in 1 36 g AgNO3 107 8 14 0 48 169 8 g 1 36 AgNO3 1 mol 169 8 g 6 02 10 23 molecules 1 mol AgNO3 4 82 10 21 100 0 g of H2 how much NH3 can you make 3H2 g 2N2 g 2NH3 g 100 g H2 1 mol H2 2 0 g H 2 mol NH3 3 mol H2 17 0 g 1 mol NH3 567 g NH3 How much H20 is needed to make 1 00 g of O2 H20 H2 O2 2H2O 2H2 O2 1 0 g O2 1 mol 32 g 2 mol H20 1 mol O2 18 0 g 1 mol H20 1 13 g H20 How many molecules of HCL are in 25 g of HCl 25 g HCl 1 mol HCL 36 5 g HCL 6 02 1023 molecules 1 mol 4 12 10 23 How much CO2 can you make if you have Take home problem How much CO2 can you make if you have 100 g of C C O2 CO2 Practice How much Ca OH 2 is needed to neutralize 6 34 g of Hcl Ca OH 2 2HCL CaCl2 2H2O 6 34 g HCL 1 mole HCl 36 5 g 1 mol Ca OH 2 2 mol HCL 7 40 g 1 mol Ca OH 2 6 42 g Ca OH 2 Stoichiometry Limiting reagent the limited supply Excess reagent the extra supply CO g 2H2 g CH3OH 356 g 65 g 8 car bodies 48 tires 8 cars 8 cars limit tires excess 1 What is limiting reagent Carbon Monoxide 2 How much methanol can be produced 406 g 3 How much excess reactant 14 2 g 356 g CO 1 mol CO 28 g 1 mol CH3OH 1 mol CO 32 0 g 1 mol CH3OH 406 g CH3OH 65 g H2 1 mol H2 2 g 1 mol methanol 2 mol H2 32 g 1 mol methanol 520 g 356 g CO 1 mol CO 28 0 g 2 mol H2 1 mol CO 2 0 g 1 mol H2 50 8 g H2 reacted Excess reagent 65 0 g 50 8 g 14 2 g left over C4H10 O2 CO2 H2O 2C4H10 13O2 8CO2 10H2O 355 g of C4H10 is combined with 678 g of O2 How many grams of H2O can be produced 355 g C4H10 1 mol C4H10 58 g 10 mol H2O 2 mol C4H10 18 g 1 mol H2O 551 g H20 678 g O2 1 mol O2 32 g 10 mol H2O 13 mol O2 18 g 1 mol H2O 293 g