chaper 1

Question 1

extrinsic properties

Answer 1

the propery depends on how much of the substance there is ie mass

Question 2

intrinsic

Answer 2

the property does not depend on the amount of the substance there

Question 3

multiplying sig figs

Answer 3

final product has the same number as the smallest sig fig multiple

Question 4

adding and subtracting sig figs

Answer 4

smallest number after decimal point is kept

Question 5

chemistry

Answer 5

the study of the nature and properties and transformations of matter

Question 6

physical change

Answer 6

reversable ie change of state

Question 7

chemical change

Answer 7

not reversabe. the rearragnement of the atoms of chemical compounds into separate compounds

Question 8

solid to gas

Answer 8

sublimation

Question 9

gas to solid

Answer 9

deposition

Question 10

liquid to solid

Answer 10

freezing

Question 11

solid to liquid

Answer 11

melting

Question 12

liquid to gas

Answer 12

vaporization

Question 13

gas to liquid

Answer 13

condensation

Question 14

two types of vaporization

Answer 14

evaporation and boiling

Question 15

evaporation

Answer 15

liquid to gas at the interface. ie the part of the liquid touching the air

Question 16

boiling

Answer 16

the max temp a liquid can remain a liquid

Question 17

4 basic assumptions of atomic theory

Answer 17

1. all matter is composed of matter
2. all atoms of a given element differ form the atoms of another element
3. chemical compounds are combined in specific ratios
4. chemical reactions only alter the way atoms are arranged, not the elements themseves.

Question 18

what is an atom made out of

Answer 18

protons nutrons and electrons

Question 19

explain the subatomic level of an atom

Answer 19

neutrons weigh more than protons and electrons
neutrons have no charge
pro += ele-

Question 20

elements are defined by

Answer 20

the number of protons

Question 21

atomic number

Answer 21

the number of protons

Question 22

mass number

Answer 22

the mass of both protons and nutrons

Question 23

isotope

Answer 23

atonms of a single element with varying number of neutrons

Question 24

the mole

Answer 24

6.022e23

Question 25

ion

Answer 25

a charged particle

Question 26

cation

Answer 26

a positively charged particle

Question 27

anion

Answer 27

a negatively charged particle

Question 28

how is atomic mass calculated

Answer 28

Atomic mass is calculated using isotopes. It is equal to the summation of the products of the masses of the isotopes and their respective fractional natural abundances.

Question 29

what is a mole

Answer 29

A mole is defined as the amount of material containing 6.0221421×1023 particles (Avogadro’s number).

Question 30

how do solids, liquids and gasses differ

Answer 30

a solid has a fixed volume and rigid shape; liquids assume the shape of their container; gases always assume the shape and volume of their container

Question 31

matter is composed of

Answer 31

pure substances and mixtures

Question 32

pure substances are composed of

Answer 32

elements and compounds

Question 33

mixtures are composed of

Answer 33

heterogenious and homogenius

Question 34

law of multiple proportions

Answer 34

when 2 ewlements form 2 differenct compounds, the masses of element B that combine with 1 g of element A are a ration of whole numbers.