
Stoichiometry Methods and Calculations

Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Hard

Emma Peterson
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to balance the chemical equation in stoichiometry problems?
To reduce the amount of reactants needed
To increase the reaction speed
To ensure the reaction is safe
To maintain the mole ratio
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the first method, what is the mole ratio of O2 to H2O used to solve the problem?
2:2
2:1
1:2
1:1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final mass of H2O obtained using the first method?
0.1 grams
0.2 grams
3.6 grams
3.2 grams
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the second method, what mathematical operation is used to find the moles of H2O?
Addition
Cross-multiplication
Division
Subtraction
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using cross-multiplication in the second method?
To convert grams to moles
To balance the equation
To find the mole ratio
To solve for the unknown moles
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the third method, why is unit cancellation important?
To increase the reaction rate
To ensure the correct units are used
To simplify the equation
To reduce calculation errors
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mole ratio of H2O to O2 used in the third method?
1:2
1:1
2:1
2:2
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