DEFINITIONS
Mass relationships between substances in a chemical reaction.
Stoichiometry
What is the first step you take in a mass to mass relationship problem
Balance the equation
What are you trying to find when you convert moles to moles?
Mole Ratio
T/F: You can find the volume of a new substance in a chemical reaction
True
Fe3O4 + 4CO---> 3Fe + 4CO2 How many moles of CO are needed to react with 16.5 g of Fe3O4
0.285 mol CO
Indicated by coefficients in a balanced equation
Mole ratio
What is the second step you take in a mass to mass relationship problem
What are you trying to find when you convert moles to grams?
Molar Mass, Formula Mass, PT Mass
What is the formula for mole ratio
moles of old / moles of new
How many moles of Fe2O3 will form from 5.0 moles of Fe?
4Fe + 3O2---> 2Fe2O3
2.5 mol Fe2O3
Reactant that is not used up when a reaction is completed
Excess Reactant
What is the third step you take in a mass to mass relationship problem
Use mole ratio to convert to new substance
What is the conversion you use convert mass to moles
1 mol / Molar Mass (Formula Mass, PT Mass)
4Fe + 3O2---> 2Fe2O3 Find the mole ratio of Iron to Oxygen
4/3
How many moles of KClO3 must decompose in order to produce 9 moles of oxygen gas?
2KClO3 --> 2KCl + 3O2
6 mol KClO3
Reactant that is used up completely in a chemical reaction
Limiting Reactant
What is the fourth step you take in a mass to mass relationship problem
Convert new moles to given mass
What is the conversion you use convert mole to volume
22.4 L / 1 mol
What is the volume of a gas at STP?
22.4 L
How many grams of NH3 will be produced from 28 g N2?
N2 + 3H2 --> 2NH3
34 grams NH3
a process that involves rearrangement of the molecular or ionic structure of a substance
What is something you could use to help with the problem solving
Mole City
What is the conversion you use convert molecules to moles
1 mol / 6.02 x 1023
What is the molar mass of camel fat. (HINT: the formula for camel fat is C57H110O6)
891.48 g/mol
What volume of Hydrogen at STP is produced from 75 g of HCl?
Mg + 2HCl --> MgCl2 + H2
23 L H2