
Balancing Chemical Equations: An Introduction

Interactive Video
•
Science
•
9th - 12th Grade
•
Hard
Standards-aligned

Sophia Harris
FREE Resource
Standards-aligned
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What principle states that the number of atoms must remain constant before and after a chemical reaction?
Law of Conservation of Mass
Law of Multiple Proportions
Avogadro's Law
Law of Definite Proportions
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What can be changed to balance a chemical equation?
Chemical symbols
Coefficients
Reaction conditions
Subscripts
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the reaction Na + Cl2 -> NaCl, what must be done to balance the chlorine atoms?
Decrease chlorine atoms on the product side
Change the subscript of Cl
Increase sodium atoms on the reactant side
Add a coefficient before Cl2
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When balancing the equation for the reaction of sulfur and oxygen, what is the correct coefficient for oxygen to balance the equation?
8
3
12
2
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of incorrectly balancing a chemical equation?
Faster reaction rates
Creation of new elements
Violation of the law of conservation of mass
Decreased product yield
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for sodium phosphate when balancing charges?
Na4P2O8
NaPO4
Na3PO4
Na2PO4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the reaction of iron 3 oxide, what is the correct formula for the compound?
FeO3
Fe3O2
FeO2
Fe2O3
Tags
NGSS.MS-PS1-1
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