

Balancing Chemical Equations Concepts
Interactive Video
•
Chemistry
•
9th - 10th Grade
•
Practice Problem
•
Hard
Lucas Foster
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 chemical equations?
To increase the number of products
To reduce the number of reactants
To obey the law of conservation of mass
To make the equation look neat
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of coefficients in a chemical equation?
They indicate the number of molecules
They change the identity of the elements
They are used to decorate the equation
They alter the subscripts of elements
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a common mistake when balancing equations?
Using a chart
Counting the atoms
Changing the subscripts
Changing the coefficients
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation Fe2O3, what does the subscript '3' represent?
Three molecules of Fe2O3
Three molecules of oxygen
Three atoms of iron
Three atoms of oxygen
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you balance the equation with one carbon, four hydrogens, and two oxygens on the reactant side?
Remove oxygen atoms
Adjust the coefficients
Change the subscripts
Add more carbon atoms
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct coefficient for HCl when balancing the equation with two hydrogens and two chlorines?
1
4
2
3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the ratio of hydrogen to oxygen in the balanced equation for water?
1:1
2:1
1:2
2:2
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