New Chem

A chemical reaction makes

• a new substance

• something melt

• something freeze

• some new substances, but not always

True or false: Substances can have the same EXACT melting point

• True

• False

A trait or characteristic of a substance is called a

• proton

• property

• quark

Freezing and melting are examples of

• physical change

• chemical change

• depends

Ripping. a piece of paper is a ....

• chemical change

• physical change

• depends

Mr. Gaither Freezes water. He then melts water. He then makes it evaporate. How many chemical changes were there?

• 0

• 1

• 2

• 3

A substance burning or rusting would be an example of a

• physical change

• chemical change

• depends

Substances get all of their properties from...

• the arrangement of the atoms

• their appearance

• the air pressure

• temperature

Sugar has a solubility of 150g/100mL of water. Will 200g dissolve in 100mL of water?

• yes all will dissolve

• none will dissolve

• only some will dissolve

A substance has a solubility of 12g/100mL of water.

Mr. Gaither adds 25 grams of the substance to water.

How many grams will be leftover undissolved at the bottom of the container?

• All of it will dissolve

• 12g

• 13g

• 37g