chemistry unit 2

Question 1

chemistry

Answer 1

science that deals with the identification of the substances of which matter is composed, the investigation of their properties and the ways in which they interact, combine, and change

Question 2

matter

Answer 2

as distinct from mind and spirit that which occupies space and possesses rest mass, especially as distinct from energy.

Question 3

Extensive Properties

Answer 3

Mass and volume are extensive properties, but hardness is intensive.

Question 4

Intensive Properties

Answer 4

a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system

Question 5

mass

Answer 5

a coherent, typically large body of matter with no definite shape.

Question 6

volume

Answer 6

the amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.

Question 7

Physical Property

Answer 7

is any property that is measurable, whose value describes a state of a physical system.

Question 8

Physical Change

Answer 8

are changes affecting the form of a chemical substance, but not its chemical composition.

Question 9

Chemical Property

Answer 9

a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed

Question 10

Chemical Change

Answer 10

a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition

Question 11

Phase (Phase of Matter)

Answer 11

The states in which matter can exist: as a solid, liquid, or gas. When temperature changes.

Question 12

solid

Answer 12

firm and stable in shape; not liquid or fluid.

Question 13

liquid

Answer 13

a substance that flows freely but is of constant volume, having a consistency like that of water or oil.

Question 14

gas

Answer 14

an airlike fluid substance which expands freely to fill any space available, irrespective of its quantity.

Question 15

freezing

Answer 15

below 32°F (0°C).

Question 16

melting

Answer 16

make or become liquefied by heat.

Question 17

vaporation

Answer 17

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

Question 18

element

Answer 18

a part or aspect of something abstract, especially one that is essential or characteristic.

Question 19

Chemical Symbol

Answer 19

an abbreviation or short representation of a chemical element

Question 20

compound

Answer 20

an abbreviation or short representation of a chemical element

Question 21

mixture

Answer 21

a substance made by mixing other substances together.

Question 22

Homogeneous Mixture

Answer 22

is simply any mixture that is uniform in composition throughout.

Question 23

Solution

Answer 23

a means of solving a problem or dealing with a difficult situation.

Question 24

Heterogeneous Mixture

Answer 24

A mixture is a combination of two or more pure substances in which the original substances retain their chemical properties.

Question 25

Filtration

Answer 25

the action or process of filtering something.

Question 26

Distillation

Answer 26

the action of purifying a liquid by a process of heating and cooling.

Question 27

Chemical Reaction

Answer 27

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 28

Reactant

Answer 28

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

Question 29

Product

Answer 29

an article or substance that is manufactured or refined for sale.

Question 30

Precipitate

Answer 30

cause (an event or situation, typically one that is bad or undesirable) to happen suddenly, unexpectedly, or prematurely.

Question 31

Law of Conservation of Mass

Answer 31

the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form the principle that matter cannot be created or destroyed. Expand