CONVERSIONS
What do you need to find when you convert moles to moles?
Mole Ratio.
The branch of chemistry that deals with the calculation of the amounts of reactants and products involved in chemical reactions is called:
Stoichiometry
How many moles of Fe2O3 will form from 8.0 moles of Fe?
4Fe + 3O2 → 2Fe2O3
4 moles Fe2O3
What do you need to find when you convert between moles and grams?
Molar Mass.
What conversion factor is indicated by coefficients in a balanced equation?
Mole Ratio.
Fe3O4 + 4 CO--->3 Fe + 4 CO2
How many moles of CO are needed to react with 16.5 g of Fe3O4?
0.285 moles CO
What is the molar mass of H2O?
18g/mol
Stoichiometry is based around ratios and the law of conservation of:
Mass
__ AlBr3 + __ K2SO4 → ___ KBr + ___ Al2(SO4)3
1. Balance the following equation
2. Calculate how many mols of KBr will form if 3.2 moles of AlBr3 react?
9.6 mol KBr
4Fe+3O2--->2Fe2O3
Find the mole ratio of Iron to Oxygen.
4:3
You need a ________________ chemical equation to do stoichiometry.
Balanced
1 FeCl3 + 3 NaOH → 1 Fe(OH)3 + 3 NaCl
If 4 moles of NaOH react, how many grams of Fe(OH)3 will be produced?
142.49g Fe(OH)3
When converting the mass of one substance to the mass of another in stoichiometry, what units do you move through? Fill in the steps.
________ → _________ → __________ → _________
mass → moles → moles → mass
What is the name of the reactant that you have leftovers of? (Challenge Question, x2 points)
Excess reactant
1 S8 + 12 O2 → 8 SO3
How many grams of O2 are required to react with 201g of S8?
300.78g O2