Chemistry - Unit 1 Review

Significant Figures

100

The number .0032 has THIS many significant figures. 

2

200

The number 100 has THIS many significant figures. 

1

300

The number .1054 has THIS many significant figures

4

400

The number 340. has THIS many significant figures

3

500

Complete the following math, with the proper amount of significant figures:

12.40 + .23 +1.43 = ?

14

Physical Vs. Chemical Properties

100

A student observes this type of change when they pour two chemicals together and see a precipitate form:

Chemical Change. 

200

These type of properties can be observed without impacting the identity of a substance. 

What is Physical Property?

300

A piece of paper is ripped in half, which is an example of this type of property. 

Physical

400

A piece of wood is burned for fuel, an example of this type of change.

Chemical 

500

An easy way to tell if a change is chemical or physical. 

What is, is the change reversible?

Heterogeneous V. Homogenous

100

Pic #1

Homogeneous

200

Pic #2

Homogenous

300

Pic #3

Heterogeneous

400

Pic #4 

Homogeneous. 

500

Pic #5

Heterogeneous

You're my destiny, I mean, my density.

100

What is the formula for density?

Density = Mass/Volume

200

The density of a rock that has a mass of 4g and a volume of 12 mL. 

.33 g/mL

300

The volume of a liquid that has a density of .4g/mL and a mass of 400g. 

1000mL or 1L.

400

The mass of a sample with a volume of 12mL and a density of .12345 g/mL

1.5g

500

A scientist placed a rock into a graduated cylinder, the volume moved from 23mL to 31.5mL. The mass of the rock was 11g, what is its density?

1.3 g/mL

Whats the matter?

100

Name an Element. Any Element. 

Teacher Discretion. 

200

CO₂ is an example of. 

a compound. 

300

Mixtures of compounds can be separated out by their.....

Density, Boiling Point, or Filtered 

400

Defined "Pure Substance"

Any substance which consists completely of one type of compound or element. 

500

How would you separate out salt from water?

Boil it.