Chemical Equations and Conservation of Mass

In a chemical equation, what are the substances on the left side of the arrow called?

• yields (results in)

• products

• reactants

• chemicals

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In a chemical equation, what are the substances on the right side of the arrow called?

• yields (results in)

• products

• reactants

• chemicals

In a chemical equation, what does the arrow mean?

• yields (results in)

• products

• reactants

• chemicals

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the term for the starting materials of a chemical reaction?

• matter

• reactants

• products

• chemical equation

What is the term for the end materials of a chemical reaction?

• matter

• reactants

• products

• chemical equation

Tags

NGSS.MS-PS1-5

In this chemical equation what does the 3 before the H₂ mean?

• 3 hydrogen (H) atoms

• 3 hydrogen (H₂) molecules

• 3 ammonia (NH₃) molecules

• the reaction occurs 3 times

Tags

NGSS.MS-PS1-5

In this chemical equation what does the 2 after the N (in N₂) mean?

• 2 nitrogen (N) atoms

• 2 nitrogen (N₂) molecules

• 2 ammonia (NH₃) molecules

• the reaction occurs 2 times

Tags

NGSS.MS-PS1-1

In this reaction, how many molecules of nitrogen (N₂) are present in the reactants?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

In this reaction, how many molecules of hydrogen (H₂) are present in the reactants?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

In this reaction, how many molecules of ammonia (NH₃) are formed?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2