Balancing Equations
8th Grade
•15 Qs
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Balancing Equations
Quiz
•
Science
•
8th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
DRAG AND DROP QUESTION
1 min • 1 pt
The numbers placed in (a) of formulas to balance equations are called (b) , and they multiply all the atoms in a (c) . Thus, the symbol “2NaHCO₃” indicates (d) units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms
(2 X 3= 6, the coefficient times the subscript for O).
front
coefficients
two
formula
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the balanced equation for the combustion of methane (CH4)?
@@ ext{CH}_4 + 2 ext{O}_2 ightarrow ext{CO}_2 + 2 ext{H}_2 ext{O}@@
@@ ext{CH}_4 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@
@@2 ext{CH}_4 + 3 ext{O}_2 ightarrow 2 ext{CO}_2 + 4 ext{H}_2 ext{O}@@
@@ ext{CH}_4 + 3 ext{O}_2 ightarrow ext{CO}_2 + 2 ext{H}_2 ext{O}@@
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following represents a balanced chemical equation?
@@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@
@@2 ext{H}_2 + ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
@@ ext{H}_2 + 2 ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
@@2 ext{H}_2 + 2 ext{O}_2 ightarrow 2 ext{H}_2 ext{O}@@
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a balanced chemical equation, the number of atoms of each element on the reactant side must be equal to the number on the product side. Which law does this illustrate?
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Law of Conservation of Energy
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the coefficient of oxygen when balancing the equation: @@ ext{C}_3 ext{H}_8 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@?
5
3
4
2
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is the balanced equation for the reaction of hydrogen gas with nitrogen gas to form ammonia?
@@ ext{H}_2 + ext{N}_2 ightarrow ext{NH}_3@@
@@3 ext{H}_2 + ext{N}_2 ightarrow 2 ext{NH}_3@@
@@2 ext{H}_2 + ext{N}_2 ightarrow 2 ext{NH}_3@@
@@ ext{H}_2 + 3 ext{N}_2 ightarrow 2 ext{NH}_3@@
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When balancing the equation @@ ext{Fe} + ext{O}_2 ightarrow ext{Fe}_2 ext{O}_3@@, what is the coefficient for iron (Fe)?
4
2
3
1
Tags
NGSS.MS-PS1-5
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