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WorksheetsStoichiometry Unit Study Guide
Total questions: 25
Worksheet time: 15mins
Stoichiometry is the:
calculation of amounts of substances in a chemical reaction from the balanced equation
calculation of the mass of substances in a chemical reaction from the chemical equation
calculation of the number of particles in a physical reaction from the balanced equation
bane of my existence
What is the most important piece of information necessary to perform a stoichiometric calculation?
Number of moles
Number of particles
Liters of gas
Mass of reactants
A balanced chemical equation
Using stoichiometry, you can determine which of the following? (more than one answer may apply)
mass of products given the mass of reactants
mass of a salt produced by the reaction between two volumes of gas
number of reactant molecules needed to produce 150 grams of product
how much water can be made by burning methane
A certain automobile contains 4 tires, 2 headlights, 1 steering wheel, and 6 spark plugs. How many of each part will be required to build 17 of these cars?
66 tires, 32 headlights, 15 steering wheels, 102 spark plugs
72 tires, 48 headlights, 17 steering wheels, 96 spark plugs
68 tires, 34 headlights, 17 steering wheels, 102 spark plugs
68 tires, 32 headlights, 17 steering wheels, 102 spark plugs
The reaction of sodium with water produces sodium hydroxide and hydrogen gas: 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g) How many moles of water are needed to react with 0.89 moles of sodium?
0.445
0.89
1.01
1.78
The reaction of aluminum metal with an aqueous solution of silver nitrate produces aqueous aluminum nitrate and solid silver metal. What is the balanced chemical equation describing this reaction?
Al (s) + 3 AgNO3 (aq) → Al(NO3)3 (aq) + 3 Ag (s)
Al + 3 AgNO3 → Al(NO3)3 + 3 Ag
Al (aq) + AgNO3 (s) → Al(NO3)2 (aq) + 3 Ag (g)
Al(s) + SiNi8 (aq) → AlNi8 (aq) + Si (s)
A recipe for lasagna that serves four requires ¼ cup grated Parmesan cheese. You have eight people coming for dinner and want to expand the recipe to feed them. How much Parmesan cheese do you need?
¼ cup
¾ cup
½ cup
2/3 cup
Stoichiometry requires the use of a(n)
balanced equation
unbalanced equation
skeleton equation
word equation
In a laboratory situation, it is common to express the amounts of materials in all of the ways below except
mL
moles
grams
number of particles
Mole ratio is a conversion factor that converts
moles to grams
grams to moles
ratio of one material to another
ratio of atoms in the equation
The reagent which determines how much product will be made is the _______ reagent
deficient
rate-limiting
limiting
restricted
The excess reagent is the material that is
used up in the reaction
left over
brings stoichiometric balance
makes extra product
A balanced equation tells us
the masses of materials needed
the masses of the products
the mole ratio needed for the reaction to occur
the number of representative units of the products
True/False: All reactions need an excess reagent.
True
False
True/False: Limiting reagents produce multiple products.
True
False
To identify the excess reagent, all data must be in ______ quantities
molal
molecular
mass
molar
True/False: A balanced equation allows us to determine the excess reagent.
True
False
The theoretical yield is
the amount you hope to get
the maximum amount that can be formed from the given amounts of reactants
the amount you need for the next reaction
the actual amount you obtain in the reaction
True/False: The theoretical yield is often below 90%.
True
False
17. Actual yield is
the amount you obtain in the reaction
the amount you want to obtain in the reaction
the amount of product using excess reagent
the amount of product before purification
In the reaction A+B→C+D, 7.2 moles A form 5.4 moles C. The mole ratio A:C is
2:1
4:2
2:3
4:3
Your recipe calls for 27 slices/pizza, you have 142 slices. How many pizzas can you make?
four
five
six
seven
How many moles of I2 are produced if 4.7 moles Br2 are reacted with excess FeI3?
4.7
9.4
14.1
18.8
How many moles of carbon monoxide is needed to react with 47.2 L of I2O5 at STP?
8
9
10
11
What mass of zinc oxide will be formed from 20.0 g of zinc?
10.5 g
19.8 g
24.9 g
32.3 g
