Mass Stoichiometry - Questions
The Mass Stoichiometry Concept Builder is comprised of 18 questions. The questions are organized into three Question Groups and spread across three different difficulty levels. Each question organizes information in a table where each column of the table represents a species in a given chemical equation. For each row of the table, students are provided the mass of a reactant or a product and must calculate the corresponding mass of reactant(s) reacted and/or product(s) produced. Each question involves either 10 or 12 gram-to-gram stoichiometry calculations, depending on the difficulty level. The
Apprentice Difficulty Level includes a synthesis reaction (two reactants and one product) and 10 calculations. The provided numbers are "nice"; they are typically a whole number multiple of the molar mass. The
Master Difficulty Level includes a hydrocarbon combustion reaction (two reactants and two products) and 12 calculations. The provided numbers are "nice". The
Wizard Difficulty Level also includes a hydrocarbon combustion reaction and 12 calculations. The provided numbers are "nasty". Students can use the Check Answers button at any time to check the accuracy of their calculations. Feedback is immediate and students can correct their mistakes. The exact questions are shown below.
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Mass Stoichiometry
Activity 1: Apprentice Difficulty Level
Question Group 1
Question 1
Consider the reaction:
N2 + 3 H2 → 2 NH3
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 2
Consider the reaction:
N2 + 3 H2 → 2 NH3
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 3
Consider the reaction: 4
Na + O2 → 2 Na2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 4
Consider the reaction: 4
Na + O2 → 2 Na2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 5
Consider the reaction:
2 H2 + O2 → 2 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 6
Consider the reaction:
2 H2 + O2 → 2 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Activity 2: Master Difficulty Level
Question Group 2
Question 7
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 8
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 9
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 10
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 11
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 12
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Activity 3: Wizard Difficulty Level
Question Group 3
Question 13
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 14
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 15
Consider the reaction:
C3H8 + 5 O2 → 3 CO2 + 4 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 16
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 17
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.
Question 18
Consider the reaction:
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O
The mass (in grams) of a reactant or product is shown in the table. Determine the mass (in grams) of the other species that will react with or be produced by the given mass.