Stoichiometry map
What steps do you need to take to get to the mass of substance B from the moles of substance A?
Moles to Moles
Moles to Mass
What is an excess reagent?
An excess reagent is a substance that is in excess after a reaction takes place - the leftover can't be used due to a limiting reagent limiting it.
What is the percent yield equation?
(Actual yield / theoretical yield) * 100 = percent yield
Given the equation N2 + 3H2 --> 2NH3, write the following molar ratios: N2/H2
1/3
If you have 3 slices of bread, 1 slice of cheese, and a slice of ham, but it takes 2 slices of bread, 2 slices of cheese, and 1 slice of ham to make a sandwich, what is the limiting reagent?
CHEESE
What is the equation for mole to volume and vice versa?
22.4 L/1.00 mol
1.00 mol/22.4 L
H2 + Br2 --> HBr
3.4 moles of H2 and 4.8 moles of Br
What's the limiting reagent?
hydrogen!
If the actual yield of rusted iron is 18 grams and the theoretical yield is 18.5 grams, what is the percent yield?
97.30 % or 97%
Given the equation, N2 + 3H2 --> 2 NH3, write the following molar ratios. H2/NH3
3/2
8 slices of bread
3 slices of meat
4 slices of cheese
it takes 2 bread, a meat, and a cheese for this sandwich. Excess reagent?
bread and cheese
What steps do you need to take to get from substance A's amount of particles to substance B's volume?
Particles to moles
Moles to moles
Moles to volume
CH4 + 2O2 --> CO2 + 2H2O
10 g of O2 and 5 g of CH4 -- limiting reagent?
O2!!!
If the percent yield of sodium chloride is 95% and the actual yield is 18 grams, what is the theoretical yield?
about 18.95 grams
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
What is the molar ratio between C8H18/H2O?
1/9 or 2/18
If it takes two slices of bread, a slice of cheese, and a slice of ham to make a sandwich, how much of each substance would it take to make exactly 3 sandwiches?
6 slices of bread, 3 slices of cheese, and 3 slices of ham
What are the equations to go from particles to mole, to mole, to volume?
1/6.022 x 10^23, coefficients, 22.4 L/1.00 mol.
If 6 moles of FeO react with 6 moles of Al, how much molten iron will be produced?
3 FeO (s) + 2 Al (s) --> 3 Fe (l) + Al2O3 (s)
6 moles of molten iron
What is the percent yield, if a reaction was predicted to produce 12.4 grams of a compound and the actual product was 12.1 grams? Round to the nearest tenth.
97.6%
2 H2 + O2 --> 2H2O
suppose you had 20 moles of O2, how many moles of H2O could be made?
40 mol of H2O
Excess reagent if you have -- 5 bread, 5 cheese, and 5 ham, if you need 2 bread, 2 cheese, and 1 ham
1 excess bread, 1 excess cheese, 3 excess ham