Chapter 1

Question 1

Pure substance

Answer 1

Contain a single component or multiple components.
-multi components are separated by chem reactions

Question 2

Mixture

Answer 2

Always have multiple components
-separated by physical methods

Question 3

Single component

Answer 3

elements

Question 4

multi component

Answer 4

compounds

Question 5

homogeneous mixtures

Answer 5

even distribution

Question 6

heterogeneous mixture

Answer 6

uneven distribution

Question 7

Methods of Separation:
Physical Change

Answer 7

Does NOT change the composition of a component

Question 8

Methods of Separation: Chemical Change

Answer 8

DOES change the composition of a component

Question 9

Intensive property

Answer 9

independent of sample size
-color, freezing point, boiling point, etc

Question 10

extensive property

Answer 10

dependent on a samples size
-mass and volume

Question 11

Physical Property

Answer 11

doesn’t change the composition of a substance

Question 12

Chemical Property

Answer 12

Changes the composition of a substance

Question 13

Practice Sig Figs, Dimensional Analysis, C to K conversions, density, and specific gravity.

Answer 13

K= C + 375.15
C= K - 273.15
F= (9 F/ 5 C) x C + 32 F
d= m/v

specific gravity= density of a solution/density of water.
-density of water is usually 1 with its units.

Question 14

Accuracy

Answer 14

how close you are to a desired target

Question 15

Precision

Answer 15

how reproductible are your actions

Question 16

Law

Answer 16

reliable observation

Question 17

Theory

Answer 17

models of behavior