Chemistry Basics

Question 1

What is 85,000 in scientific notation?

Answer 1

8.5 x 10^4

Question 2

How would 6.1 x 10^5 be written in standard notation?

Answer 2

610,000

Question 3

Multiply (3.1 x 10^4) by (2.0 x 10^3).

Answer 3

6.2 x 10^7

Question 4

How many significant figures are there in number 92.07?

Answer 4

4

Question 5

How many significant figures are there in the number 6100?

Answer 5

2

Question 6

How many significant figures are there in the number 0.0070?

Answer 6

2

Question 7

Which conversion factor would you use to convert 752 miles into kilometers – 1 mile / 1.6 km or 1.6 km / 1 mile?

Answer 7

1.6 km / 1 mile

Question 8

Matter that always has exactly the same composition is classified as what?

Answer 8

Pure substance

Question 9

What type of substance only contains one type of atom?

Answer 9

An element

Question 10

Which substance always contains two or more elements joined in a fixed proportion?

Answer 10

A compound

Question 11

In which type of mixture are the parts noticeably different from one another?

Answer 11

Heterogeneous

Question 12

In which type of mixture are the substances so evenly distributed that it is difficult to tell one from another?

Answer 12

Homogeneous

Question 13

Which type of property can be observed or measured without changing the composition of the material?

Answer 13

Physical

Question 14

What kind of change occurs when a physical property of the material changes but the basic substance remains the same?

Answer 14

Physical

Question 15

What kind of property is the ability to produce a change in the composition of matter?

Answer 15

Chemical

Question 16

What kind of change occurs when a substance reacts and forms one or more new substances?

Answer 16

Chemical

Question 17

Viscosity, conductivity, melting and boiling points, and density are what kind of properties?

Answer 17

Physical

Question 18

Flammability and reactivity are what type of properties?

Answer 18

Chemical

Question 19

Change in color, producing a gas, or forming a precipitate are indicators of what type of change?

Answer 19

Chemical

Question 20

Name the five states of matter.

Answer 20

Solid, liquid, gas, plasma, and Bose-Einstein condensates

Question 21

What is the energy of motion called?

Answer 21

Kinetic energy

Question 22

What is caused when particles of a gas collide with the walls of the container in which it is held?

Answer 22

Pressure

Question 23

What is the metric unit for measuring pressure?

Answer 23

Pascal (Pa)

Question 24

Name three factors that affect gas pressure.

Answer 24

Temperature, volume, and number of particles

Question 25

Is it a phase change a physical change or a chemical change?

Answer 25

Physical

Question 26

What happens to the temperature of a substance during a phase change?

Answer 26

It does not change. It remains steady.

Question 27

A system absorbs energy from its surroundings during what type of change?

Answer 27

Endothermic

Question 28

A system releases energy to its surroundings during what type of change?

Answer 28

Exothermic

Question 29

Name the phase changes involving solids and liquids.

Answer 29

Melting and freezing

Question 30

Name the phase changes involving liquids and gases.

Answer 30

Vaporization and condensation

Question 31

Name the phase changes involving solids and gases.

Answer 31

Sublimation and deposition