chemistry: Unit 2

Question 1

Chemistry

Answer 1

Deals with the composition and properties of substances of matter

Question 2

Matter

Answer 2

Substances of which any physical object consists or is composed

Question 3

Extensive properties

Answer 3

A system that does not depend on the system size or the amount of material in the system

Question 4

Intensive properties

Answer 4

Depends on the type of matter in a sample, not the amount of matter

Question 5

Mass

Answer 5

A system that does not depend on the system size or the amount of material in the system

Question 6

Volume

Answer 6

Is the quantity of three-dimensional space occupied by a liquid, solid, or gas

Question 7

physical property

Answer 7

that do change to the chemical nature of matter.

Question 8

physical change

Answer 8

Include changing the color, shape, state of matter, or volume of a substance.

Question 9

chemical property

Answer 9

composition or identity of the substance is changed

Question 10

Chemical change

Answer 10

Involving the rearrangement of the atoms of one or more substances

Question 11

Phase (phase of matter)

Answer 11

can exist: as a solid, liquid, or gas.

Question 12

Solid

Answer 12

having the interior completely filled up, free from cavities, or not hollow

Question 13

Liquid

Answer 13

composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid.

Question 14

Gas

Answer 14

A substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid.

Question 15

Freezing

Answer 15

(of temperatures) approaching, at, or below the freezing point.

Question 16

Melting

Answer 16

to become liquefied by warmth or heat, as ice, snow, butter, or metal.

Question 17

vaporization

Answer 17

the conversion of a solid or a liquid into a gas.

Question 18

condensation

Answer 18

the result of being made more compact or dense.

Question 19

Sublimation

Answer 19

When the surface layer of snow or ice turns into fog or steam without melting,

Question 20

Deposition

Answer 20

removal

Question 21

Substance (Pure Substance)

Answer 21

that are made of only one type of atom or molecule

Question 22

Element

Answer 22

one of a class of substances that cannot be separated into simpler substances by chemical means.

Question 23

Chemical Symbol

Answer 23

the symbols in the periodic table

Question 24

Compound

Answer 24

composed of two or more parts, elements, or ingredients

Question 25

Mixture

Answer 25

an aggregate of two or more substances that are not chemically united and that exist in no fixed proportion to each other.

Question 26

Homogeneous Mixture

Answer 26

substances that has uniform composition and properties; a mixture that is uniform throughout

Question 27

Solution

Answer 27

the act of solving a problem, question

Question 28

Heterogeneous Mixture

Answer 28

a mixture of physically distinct substances with different properties

Question 29

Filtration

Answer 29

the action or process of filtering something.

Question 30

Distillation

Answer 30

the purification or concentration of a substance,

Question 31

Chemical Reaction

Answer 31

a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Question 32

Reactant

Answer 32

a substance that takes part in and undergoes change during a reaction.

Question 33

Product

Answer 33

A product is a substance that is formed as the result of a chemical reaction.

Question 34

Precipitate

Answer 34

cause (a substance) to be deposited in solid form from a solution.

Question 35

Law of Conservation of Mass

Answer 35

that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.