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WorksheetsCh 12 Stoichiometry of Chemical Reactions
Total questions: 20
Worksheet time: 10mins
How many steps is a mol A to mol B calculation?
1
2
3
4
How many steps is a mol A to g B calculation?
1
2
3
4
How many steps is a g A to mol B calculation?
1
2
3
4
How many steps is a mass A to mass B calculation?
1
2
3
4
What is the molar mass of H2O?
2.02 g/mol
16.00 g/mol
18.02 g/mol
33.01 g/mol
Given: CaC2 + 2H2O --> C2H2 + Ca(OH)2
Convert 3.6 mol CaC2 to mol C2H2
3.6 mol
6.4 mol
1.8 mol
0.89 mol
Given: CaC2 + 2H2O --> C2H2 + Ca(OH)2
Convert 32 g H2O to mol C2H2
3.2 mol
6.4 mol
1.8 mol
0.89 mol
Balance: MnO2 + HCl --> MnCl2 + H2O + Cl2
1,4,1,2,1
2,8,1,4,1
1,1,1,1,1
1,2,1,2,1
What do we call the reactant in a chemical reaction that controls the amount of product that will form?
Excess Reactant
Limiting Reactant
Beginning Reactant
Yielding Reactant
What is percent yield used to determine?
How much products will form in a chemical reaction.
The efficiency of a chemical reaction.
Which reactant is the limiting reactant.
Which type of reaction is occurring.
Given: CaC2 + 2H2O --> C2H2 + Ca(OH)2
Convert 52.7g C2H2 to grams CaC2
130.g
0.89g
68.1g
130.mol
Calculate the molar mass of C2H2.
26.04 g/mol
64.10 g/mol
13.02 g/mol
52.09 g/mol
Calculate the molar mass of CaC2.
26.04 g/mol
64.10 g/mol
13.02 g,mol
52.09 g/mol
Which substance do you use as your "GIVEN" when you are trying to calculate the grams theory in a percent yield calculation?
Excess Reactant
Limiting Reactant
First Product in the reaction
Grams Actual
Pick ALL that apply: What conversion factor(s) are needed to convert from moles A to moles B
mole ratio
molar mass A
molar mass B
Avogadro's number
Pick ALL that apply: What conversion factor(s) are needed to convert from moles A to mass B
mole ratio
molar mass A
molar mass B
Avogadro's number
Pick ALL that apply: What conversion factor(s) are needed to convert from mass A to mass B?
mole ratio
molar mass A
molar mass B
Avogadro's number
Pick ALL that apply: What conversion factor(s) are needed to convert from mass A to moles B?
mole ratio
molar mass A
molar mass B
Avogadro's number
When trying to determine the identity of the limiting reactant, what should you convert to?
moles or grams of the first reactant
moles or grams of the either reactant
moles or grams of the first product
moles or representative particles of the first product
Which is the formula for calculating percent yield?
% yield=[g actual ÷ g actual] × 100
% yield=[g actual ÷ g theory] × 100
% yield=[g theory ÷ g theory] × 100
% yield=[g theory ÷ g actual] × 100
