Balance Equations Basic

The calculation of the relationships between different molecules in a reaction is the definition of __________________.

• physics

• algebra

• stoichiometry

• language arts

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NGSS.HS-PS1-7

Before you begin any stoichiometry problem, you must always start with this.

• A periodic table.

• A calculator.

• A balanced chemical equation.

• All of the above are helpful.

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NGSS.MS-PS1-5

The hardest part of chemistry this year was:

• States of matter

• Labs

• Balancing equations

• Atomic Theory

• Stoichiometry

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

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NGSS.MS-PS1-5

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge

• subscript

• random number

• coefficient

Balance the chemical equation.

f

b

a

10

6

2

5

4

3

7

1

9

8

Tags

MS-PS1-5

Balance the equation.

​ ​ (a)   NaCl                  →          ​ (b)   Na    +    Cl₂​

• 2

• 1

• 3

• 4

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NGSS.MS-PS1-5

​ (a)   Cr₂O_{3 -}-> ​ (b)   Cr + ​ ​ ​ (c)   ​ O₂

• 2

• 4

• 3

• 1

• 5

• 6

• 8

• 7

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NGSS.MS-PS1-5

Balance the Equation.

​ (a)   P₄ + ​ (b)   O₂ --> ​ (c)   P₂O₃

• 1

• 3

• 2

• 4

Tags

NGSS.MS-PS1-5

Balance the equation:

c

e

f

3

4

5

6

1

2

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​ ​ Balance the equation. The options can be used more than once.

​ ​ (a)   K   + Cl₂       →     ​ ​ (b)   KCl

• 2

• 3

• 4

• 1

Tags

NGSS.MS-PS1-5