Conservation of Matter Review

How many nitrogen atoms are in the following molecule?

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

How many total oxygen atoms are in the following molecules?

• 1

• 3

• 6

• 9

Tags

NGSS.MS-PS1-1

How many carbon atoms are in the following molecule?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

Which side of the equation are the reactants?

• Left

• Right

Which side of the equation are the products?

• Left

• Right

Which molecules are on the reactant side? (Select all that apply)

• H2O

• C3H8

• CO2

• O2

Tags

NGSS.MS-PS1-2

What happens to the molecules in a chemical reaction?

• They stay the same

• They break apart and are reformed into the same molecule

• They break apart and form new molecules

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What happens to the total number of atoms in a chemical reaction?

• The number stays the same

• The number decreases

• The number increases

• It is random; Sometimes it decreases, sometimes it increases

Tags

NGSS.MS-PS1-5

What happens to the mass in a chemical reaction?

• The mass stays the same

• The mass decreases

• The mass increases

• It is random; Sometimes it decreases, sometimes it increases

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

If there are 28 total atoms in the reactant side of a chemical equation, how many total atoms are one the product side?

• 14

• 28

• 56

• 7

Tags

NGSS.MS-PS1-5