What is the first step in balancing a chemical equation?

Balancing Chemical Equations: Mastering the Art of Coefficients

Interactive Video
•
Chemistry, Science, Physics
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Add coefficients to the products.
Write the reactants and products with an arrow between them.
Count the number of atoms on each side.
Change the subscripts of the compounds.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation H2 + O2 = H2O, how many hydrogen atoms are on the left side?
2
1
4
3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the equation H2 + O2 = H2O not balanced?
There are more oxygen atoms on the right.
The number of hydrogen atoms is not equal on both sides.
The number of oxygen atoms is not equal on both sides.
There are more hydrogen atoms on the left.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of adding coefficients in a chemical equation?
To decrease the number of reactants.
To increase the number of products.
To balance the number of atoms of each element on both sides.
To change the chemical properties of the compounds.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What coefficient is added before H2O to balance the oxygen atoms in the equation?
1
4
2
3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After adding a coefficient to H2O, how many hydrogen atoms are on the right side?
4
5
3
2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What coefficient is added before H2 to balance the hydrogen atoms in the equation?
2
1
3
4
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final balanced equation for H2 + O2 = H2O?
H2 + O2 = H2O
2H2 + O2 = 2H2O
H2 + 2O2 = 2H2O
2H2 + 2O2 = 2H2O
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If there is no coefficient in front of an element, what is it assumed to be?
3
2
1
0
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