ESOL Chemical Reactions

How many Oxygen (red) atoms are missing from the products of this equation?

• 0

• 1

• 2

• 3

Making Kool-Aid is an example of a:

• Chemical Change

• Physical Change

Does this show a physical change or a chemical change?

• Chemical, because the bonds break and the atoms rearrange, making new molecules

• Physical, because the atoms are the same on both sides

• Chemical, because the atoms are the same on both sides

Melting is an example of a:

• Physical Change

• Chemical Change

Changing the way matter looks without changing it into a new substance:

• Chemical change
• Physical change

Toxicity, flammability, combustibility, and radioactivity are examples of

• chemical properties

• physical properties

• chemical changes

• physical changes

If the bonds of a substance break apart and the atoms rearrange to form a new substance that is ___________.

• A Physical Change

• A Chemical Change

Properties that can only be observed or measured by changing the CHEMICAL IDENTITY of a substance.

• chemical property

• physical property

• chemical change

• physical change

Will the mass of the sealed jar and its contents change or stay the same as the candle burns out?

• CHANGE

  The mass will increase as smoke is made

• CHANGE

  The mass will decrease as the candle burns and gets smaller.

• STAY THE SAME

  The mass will not change. It is a closed system and nothing can enter or exit the jar.

Melting Point is a

• physical property

• chemical property