Unit 3 Review - Gas Laws, ECM, Chem and Phys Change

Question 1

Which picture is an element?

Accepted Answer

b

Question 2

Is this a physical change or chemical change: a candle burning?

Accepted Answer

Both

Question 3

Is this a physical property or chemical property: orange color?

Accepted Answer

Physical

Question 4

Which picture is a compound?

Accepted Answer

c

Question 5

Element, compound, homogenous mixture, or heterogenous mixture: carbon dioxide gas?

Accepted Answer

Compound

Question 6

In a gas, as the volume increases, what happens to the pressure?

Accepted Answer

It decreases

Question 7

Which picture is made of only atoms and no molecules?

Accepted Answer

None

Question 8

Is this a physical or chemical property: flammability?

Accepted Answer

Chemical

Question 9

Element, compound, homogenous mixture, or heterogenous mixture: lead block (Pb)?

Accepted Answer

Element

Question 10

Element, compound, homogenous mixture, or heterogenous mixture: soda pop?

Accepted Answer

Homo mixture

Question 11

How many hydrogen atoms are in diethylene glycol water?

Accepted Answer

12

Question 12

What is the formula for the molecule in the picture? (Black is carbon, blue is hydrogen)

Accepted Answer

C3H8

Question 13

Is this a physical change or chemical change: water boiling?

Accepted Answer

Physical

Question 14

Is this a physical change or chemical change: density?

Accepted Answer

Neither

Question 15

Is this a physical or chemical property: boiling point?

Accepted Answer

Physical

Question 16

Element, compound, homogenous mixture, or heterogenous mixture: blood?

Accepted Answer

Homo mixture

Question 17

Is this a physical change or chemical change: shooting off fireworks?

Accepted Answer

Chemical

Question 18

In a gas, as the temperature increases, what happens to the pressure?

Accepted Answer

It increases

Question 19

Which picture is a mixture?

Accepted Answer

a

Question 20

In a gas, as the volume decreases, what happens to the number of collisions against the inside?

Accepted Answer

Increase

Question 21

In a gas, as the temperature increases, what happens to the speed of the atoms?

Accepted Answer

It increases

Questions 21