Chapter 1: Matter and Enegry

Question 1

Which of the following are pure compouds: sodium, sugar, oxygen, air, iron?

Answer 1

sodium, sugar, oxygen, iron

Question 2

A(n) _______ always has the same composition

Answer 2

Pure substance

Question 3

Which of the following is an element?

air, water, salt, helium, sugar

Answer 3

Helium

Question 4

A compound can consist of one kind of element, true or false?

Answer 4

Fale

Question 5

Which of the following is an example of a mixture?

hydrogen floride, purified water, earth, oxygen, gold, air in this room

Answer 5

The air in this room

Question 6

An example of a pure substance is:

Elements, compounds, pure water, carbon dioxide, all of these

Answer 6

All of these

Question 7

A homogenous mixture is also called:

A heterogenous mixture, pure substance, a coumpound, a solution, an element

Answer 7

A solution

Question 8

Table salt is an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 8

Compound

Question 9

Cholorine gas is an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 9

Heterogenous mixture

Question 10

Sand in water is an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 10

Heterogenous mixture

Question 11

Petroleum is an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 11

Heterogenous mixture

Question 12

Caffeine is an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 12

A homogenous mixture

Question 13

Water is an exame of an element, a compound, a homogenous mixture, or a heterogeneous mixture?

Answer 13

Element

Question 14

A solution can be distinguised from a compound by its variable composition, liquid state, liquid state, hererogenous mixture, a compound, an element

Answer 14

Variable composition

Question 15

Which would be an example of a homegeneous mixture?

Vodka, oily water, soil (dust), sodium choloride, aluminum

Answer 15

Vodka