Chemical Reactions Review

The law of conservation of mass states that

• The mass of a system (reaction) increases from beginning to end

• The mass of a system (reaction) stays the same from beginning to end

• The mass of a system (reaction) decreases from beginning to end

Tags

NGSS.MS-PS1-5

Which is the product in the reaction shown?

• Al₂O₃

• Al

• O₂

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many Sodium (Na) are in 6NaCl?

• 1

• 12

• 6

Tags

NGSS.MS-PS1-1

Which of the following is a type of chemical reaction?

• Melting

• Combustion

• Freezing

• Evaporation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A copper penny turning greenish after a few years is an example of ...

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

What type of reaction involves the breaking down of a substance into simpler substances?

• Single Displacement Reaction

• Double Displacement Reaction

• Synthesis Reaction

• Decomposition Reaction

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1

• 18

• 12

• 25

• 24

Tags

NGSS.MS-PS1-1

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms

• 10 atoms

• 1 atom

• 5 atoms

Tags

NGSS.MS-PS1-5

The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following models of a chemical reaction best represents the law of conservation of mass?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5