Chapter 1: Keys to the Study of Chemistry

Question 1

Properties a substance shows by itself without interacting with another substance

Answer 1

Physical Properties

Question 2

Properties of a substance shows by interacting with, or transforming into, other substances

Answer 2

Chemical Properties

Question 3

What has a fixed shape and volume

Answer 3

Solid

Question 4

What has a verying shape the conforms to the shape of the container?

Answer 4

Liquid

Question 5

What has no fixed shape of volume and therefore does not have surface area?

Answer 5

Gas

Question 6

What is the first step of the scientific approach?

Answer 6

Observation

Question 7

What is the second step of the scientific approach?

Answer 7

Hypothesis

Question 8

Describe hypothesis.

Answer 8

Tentative proposal that explains observations

Question 9

What is the third step of the scientific approach?

Answer 9

Experiment

Question 10

Discribe experiment.

Answer 10

Procedure to test hypothesis, measures one variable at a time.

Question 11

What is the fourth step of the scientific approach?

Answer 11

Model (Theory) or Hypothesis

Question 12

Why would you want to revist your hypothesis following your experiment phase?

Answer 12

Experimental results do not support hypothesis.

Question 13

What is the fifth step of the scientific approach?

Answer 13

Further Experiment

Question 14

Describe further experiment.

Answer 14

Test predictions based on model

Question 15

What would happen if further experimentation does not support the model?

Answer 15

Model is altered and process is repeated.

Question 16

What is the SI unit for mass?

Answer 16

Kg (Kilogram)

Question 17

What is the SI unit for length?

Answer 17

m (Meter)

Question 18

What is the SI unit for time?

Answer 18

sec/s (Second)

Question 19

What is the SI unit for temperature?

Answer 19

K (Kelvin)

Question 20

What is the SI unit for amount of a substance?

Answer 20

mol (Mole)

Question 21

What is the SI unit for electrical current?

Answer 21

A /amp (Ampere)

Question 22

What is the SI unit for luminous intensity?

Answer 22

cd (Candela)

Question 23

mega-

Answer 23

1 x 10^6

Question 24

kilo-

Answer 24

1 x 10^3

Question 25

deci-

Answer 25

1 x 10^ -1

Question 26

centi-

Answer 26

1 x 10^ -2

Question 27

milli-

Answer 27

1 x 10^ -3

Question 28

micro-

Answer 28

1 x 10 ^ -6

Question 29

nano-

Answer 29

1 x 10^ -9

Question 30

pico-

Answer 30

1 x 10^ -12

Question 31

How many significant figures should 2.00 + 3 have?

Answer 31

One

2.00 + 3 = 5

Question 32

How many significant figures should 5.4686 - 234.65 have?

Answer 32

Five

5.4686 - 234.65 = -229.18

Question 33

How many significant figures should 12.36 + 3.127 have?

Answer 33

Four

12.36 + 3.127 = 15.49

Question 34

How many significant figures should 2.051 x 0.72 have?

Answer 34

Two

2.051 x 0.72 = 1.5

Question 35

How many significant figures should 43.21 x 0.030 have?

Answer 35

Two

43.21 x 0.030 = 1.3

Question 36

What is precision?

Answer 36

How close measurements are to each other. (Repeatability)

Question 37

What is accuracy?

Answer 37

How close measurements are to actual value.

Question 38

What is systematic error?

Answer 38

Wales that are all higher or lower then actual value.

Question 39

What is random error?

Answer 39

Values both higher and lower then actual value.

Question 40

what is chemistry?

Answer 40

The study of matter, its properties, the changes that matter undergoes and the energy associated with these changes.

Question 41

What is matter?

Answer 41

anything that has both mass and volume. What everything is made up of.

Question 42

Define composition

Answer 42

The types and amounts of simpler substances that make up a sample of matter.

Question 43

Define properties

Answer 43

The characteristics that give each substance a unique identity.
Example: density, combustion, ect.