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WorksheetsGC1 FINALS GRADED REVIEWER
Total questions: 25
Worksheet time: 13mins
How many moles of H2 is needed to react with 3 moles of O2?
2H2+ O2→ 2H2O
2 moles
3 moles
4 moles
6 moles
What is the mole ratio of H2 to O2?
2H2+ O2→ 2H2O
1:2
2:1
3:5
5:3
In the reaction 2H2+ O2→ 2H2O, you have 5 moles of H2 and 3 moles of O2. How many moles of H2 is needed to react with 3 moles of O2. Which is the limiting reagent?
H2
O2
H2O
Neither H2 nor O2
In the reaction 2H2+ O2→ 2H2O, you have 5 moles of H2 and 3 moles of O2. How many moles of H2 is needed to react with 3 moles of O2. Which is the excess reagent?
H2
O2
H2O
Both H2 and O2
How does having a lesser quantity of one reactant affect the chemical reaction?
The reaction does not start at all.
The reaction rate increases significantly.
The reaction produces more product than expected.
The lesser quantity of the reactant becomes the limiting reagent, which limits the amount of product formed.
What is a limiting reagent in a chemical reaction?
The reagent speeds up the reaction.
The reagent that is present in the greatest amount.
The reagent that remains after the reaction is complete.
The reagent determines the maximum amount of product formed because it is consumed completely in the reaction.
There are 20 slices of bread and 5 slices of cheese. Which of the two ingredients is the excess reagent, and how much is left over?
2 bread + 1 cheese = cheese sandwich
Bread
10 slices left
Cheese
5 slices left
Bread
15 slices left
Cheese
10 slices left
If 1 cup of pancake mix + ¾ cup of milk + 1 egg -→ 8 pancakes. How many eggs are required to make 24 pancakes?
2 eggs
3 eggs
5 eggs
6 eggs
Cl2+ H2O → HOCl +HCl.
What is the mole ratio of the given reactants?
1:1
1:2
1:3
2:1
2 Graham crackers + 1 piece of chocolate + 4 mini marshmallows →1 s'more. Which activities make accurate use of stoichiometry to plan for 1 s'more per person at a bonfire with 20 guests?
Buying 40 graham crackers, 20 pieces of chocolate, and 80 mini marshmallows
Buying 1 bag of mini marshmallows and 2 boxes of Graham crackers because there are more marshmallows per bag than there are Graham crackers per box.
Purchasing at least twice as many pieces of chocolate as graham crackers
Substituting marshmallow cream for the mini marshmallows would produce a greater mass of s'mores overall.
The Germanium (Ge) in steel production is normally reduced using carbon (C). If 34 mol GeO2 and 6.2 mol C are mixed, what is the limiting reagent? GeO2 + C → Ge + CO2
GeO2
C
Ge
CO2
2KClO3 → 2KCl + 3O2
How many moles of oxygen are produced when 3.0 mol of KClO3 decomposes completely?
1.0 mol
2.5 mol
3.0 mol
4.5 mol
C + 2H2 → CH4
How many moles of hydrogen are required to produce 10 mol of methane (CH4)?
2 mol
4 mol
10 mol
20 mol
2H2 + O2 → 2H20.
How many grams of water are produced from 6.00 mol of hydrogen?
36 g
72 g
108 g
144 g
Why is stoichiometry important to a manufacturer who makes chemical products?
It tells the manufacturer which reactant will be more expensive
It allows the manufacturer to think of amounts of chemicals in moles rather than by weight.
It gives the manufacturer information about how to make the reaction proceed most efficiently.
It allows the manufacturer to predict the amount of product to expect from the amount of starting material.
Today, automobiles are the primary means of transportation worldwide. To increase safety, car manufacturers install airbags in vehicles. How does stoichiometry apply to the operation of airbags in the event of a collision?
Stoichiometry is a way to reduce the impact of an accident in the event of a collision.
The application of stoichiometry in airbags is to reduce the polluted air coming inside the car.
Stoichiometry works in the airbag by converting gas to another gas, which makes it inflated.
Through stoichiometry, people can know how much nitrogen gas must be produced in a matter of seconds for the bag to inflate.
What is the molar volume at STP?
11.2 liters
22.4 liters
44.8 liters
33.6 liters
What is 0 degrees Celsius at STP?
0 K
100 K
273 K
237 K
What is the standard pressure at STP?
1 atm
100 atm
101.325 kPa
760 mmHg
What does the term 'stoichiometry' refer to in chemistry?
The study of the speed of chemical reactions.
The study of the energy changes during chemical reactions.
The measurement of the heat released or absorbed during a chemical reaction.
The quantitative relationship between reactants and products in a balanced chemical reaction.
What do you call the amount of mole of any two compounds involved in a balanced chemical reaction?
Avogadro's number
Mole Ratio
Empirical Formula
Molecular Formula
4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
How many grams of water (H2O) are produced from 34 grams of ammonia (NH3) reacting completely with oxygen (O2)?
36.04 g
53.96 g
71.02 g
89.04 g
How many liters of carbon dioxide (CO2) are produced at STP when 88 grams of propane (C3H8) combust completely?
Balanced Equation: C3H8+5O2→3CO2+4H2O
44.8 L
67.2 L
134.2 L
201.6 L
What mass of sodium chloride (NaCl) is produced when 10.0 liters of chlorine gas (Cl2) react completely with sodium at STP?
Balanced Equation:
2Na+Cl2→2NaCl
25.9 g
52.1 g
76.4 g
116.9 g
What volume of nitrogen gas (N2) is needed to react with 20.0 liters of hydrogen gas (H2) to produce ammonia (NH3) at STP?
Balanced Equation:
N2+3H2→2NH3
3.33 L
6.67 L
10.0 L
13.3 L
