What does the Law of Conservation of Mass state?

Matter cannot be gained or lost in a chemical reaction.

Matter can only be lost in a chemical reaction.

Matter can only be gained in a chemical reaction.

Matter can be gained and lost in a chemical reaction.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is half the mass of the reactants

the mass changes depending on the reaction

What is a coefficient?

The large number to the left of a formula.

The small number on the right of the chemical symbol.

A replacement occurs when...

An atom is replaced during a reaction.

Decomposition occurs when...

An atom is replaced during a reaction.

A synthesis occurs when...

An atom is replaced during a reaction.

Balance this equation: FeS + 2HCl --> FeCl 2 + H 2 O

FeS 2 + 2HCl --> FeCl 2 + H 2 O

FeS 2 + 2HCl --> FeCl 2 + H 4 O

Which of the following reactions is balanced?

None of the chemical equations are balanced.

What are Chemical Reactions?

a process in which atoms rearrange to form new substances

letter and numbers showing the types and number of atoms

Balancing Equations

Authored by Catherine Lefkowitz

Chemistry

8th Grade

NGSS covered

Used 133+ times

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85 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is this equation balanced?

yes

Not enough information

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation-
P₄+ O₂--> __P₂O₃

it is already balanced

2, 1, 3

1, 2, 3

1, 3, 2

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation.
_CH₄ + _O₂--> _CO₂+ _H₂O

1,2,1,1

2,1,2,1

1,2,1,2

0,2,0,2

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

2,1,2,1

1,2,2,1

1,2,1,2

2,2,2,2

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation
_N₂+ _H₂--> _NH₃

1,2,3

1,3,2

1,1,2

2,1,1

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

1, 2,1

already balanced

2,1,1

1,1,2

Tags

NGSS.MS-PS1-5

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