Chapter 1

Question 1

Pure Substance

Answer 1

contains only 1 type of particle and has distinct properties. can be either: elements or compounds.

Question 2

Mixture

Answer 2

contains 2 or more types of particles

Question 3

2 types of mixtures

Answer 3

Homogeneous: uniform composition (aka solution)
Heterogeneous: variable composition (different ratios in different spots)

Question 4

Physical Properties and Examples

Answer 4

can be measured or observed without changing a substance’s identity.
ex: boiling point, density, color, mass, size, time, temperature, electricity

Question 5

Physical Changes and Examples

Answer 5

transformations in matter that do not change the identity or composition of the substance
ex: changes of state, temperature, density, volume

Question 6

Chemical Properties and Examples

Answer 6

can only be observed when a substance is changed in another substance
ex: flammability, reactivity with acid

Question 7

Chemical Changes (aka reactions) and Examples

Answer 7

transformations that result in new substances

ex: combustion, oxidation, decomposition

Question 8

mega-

Answer 8

1 Mm = 10^6 m

Question 9

kilo-

Answer 9

1km = 10^3 m

Question 10

centi-

Answer 10

1cm = 10^-2 m

Question 11

milli-

Answer 11

1mm = 10^-3 m

Question 12

micro-

Answer 12

1um = 10^-6 m

Question 13

nano-

Answer 13

1nm = 10^-9 m

Question 14

Density and Equation

Answer 14

the mass per unit volume of a substance
d = mass/volume
(units are usually g/cm^3)

Question 15

Celcius to Kelvin Conversion

Answer 15

K = C + 273.15

Question 16

Celcius to Farenheit Conversion

Answer 16

C = 5/9 (F - 32)