Chapter 1

Question 1

What is the role of any scientist?

Answer 1

to explain the world around them

Question 2

What is chemistry?

Answer 2

the study of matter and its properties, the changes that matter undergoes, and the energy associated with those charges

Question 3

How do chemists study unobservable causes?

Answer 3

study observable changes in the universe

Question 4

What effects how revolutionary something is?

Answer 4

The history of chemistry

Question 5

What is the Scientific Method?

Answer 5

Observe
Hypothesize
Experiment
Model
Experiment
back to top

Question 6

What do we do since we can only observe the kind of small and not the really small?

Answer 6

make macroscopic observations and conclude on a microscopic scale

Question 7

What is macroscopic?

Answer 7

things we observe with our eyes

Question 8

What is microscopic?

Answer 8

cannot see but have significant evidence of

Question 9

What are other names for microscopic?

Answer 9

Molecular

Particulate

Question 10

What does symbolic mean in chemistry?

Answer 10

the ability of a chemist to convey a significant amount of information in a picture or symbol

Question 11

What is an atom?

Answer 11

the smallest thing that retains properties that make up an element

Question 12

What is a molecule?

Answer 12

atoms together

Question 13

What is a compound?

Answer 13

2+ elements together

Question 14

What is a mixture?

Answer 14

2+ substances physically intermingled

Question 15

Only property that can be measured before, during, and after a change?

Answer 15

physical property

Question 16

Property that can change in a chemical reaction and become different structure and substance?

Answer 16

chemical properties

Question 17

What color is oxygen in a model?

Answer 17

red

Question 18

What color is nitrogen in a model?

Answer 18

blue

Question 19

How do you tell what element is what in a model?

Answer 19

color and size

Question 20

What is intensive mean?

Answer 20

no matter how much you have of something, your results don’t change

Question 21

What is extensive mean?

Answer 21

when the amount of something changes, its identity changes

Question 22

Extensive or Intensive….Density

Answer 22

Intensive

Question 23

Extensive or Intensive….Boiling Point

Answer 23

Intensive

Question 24

Extensive or Intensive….Volume

Answer 24

Extensive

Question 25

Extensive or Intensive....luster

Answer 25

Intensive

Question 26

Extensive or Intensive....length

Answer 26

Extensive

Question 27

Extensive or Intensive....charge

Answer 27

Extensive

Question 28

Does intensive or extensive allow for comparisons?

Answer 28

Intensive

Question 29

How do u get an intensive property with extensive ones?

Answer 29

two or more extensive properties

Question 30

State of matter with strict limited movement?

Answer 30

solid

Question 31

State of matter with some movement but still significantly contacting each other?

Answer 31

liquid

Question 32

State of matter with free movement?

Answer 32

gas

Question 33

State of matter with a lot of charge?

Answer 33

plasma

Question 34

What is plasma?

Answer 34

partially ionized gas

Question 35

What is the qualitative uncertainty in a measurement?

Answer 35

lacking confidence in the final digit you guess

Question 36

What is the quantitative uncertainty in a measurement?

Answer 36

how we know how uncertain we are

Question 37

How do u increase the certainty?

Answer 37

adding more significant figures

Question 38

What is included in significant digits?

Answer 38

all the certain digits and 1 uncertain

Question 39

What digits of equipment is uncertain?

Answer 39

the last digit

Question 40

How many attempts do precise and accurate take?

Answer 40

``` precise = multiple attempts accurate = only need 1 attempt ```

Question 41

What is precise and what is accurate?

Answer 41

``` precise = identical outcome every time accurate = getting the number you want ```

Question 42

What are the two types of errror?

Answer 42

systematic | random

Question 43

Which error can be corrected if caught?

Answer 43

systematic

Question 44

Which error is found by using a comparison of the same instrument ?

Answer 44

systematic

Question 45

Which error will always be too high or too low?

Answer 45

systematic

Question 46

Which error varies and you need the average?

Answer 46

random

Question 47

What does error do to certainty?

Answer 47

decreases certainty | increases uncertainty

Question 48

What is consistent error, incorrect by a constant amount?

Answer 48

systematic

Question 49

What is an error that exists in every measurement?

Answer 49

random

Question 50

Method to express very small or large numbers allowing us to display sig figs?

Answer 50

scientific notation

Question 51

``` Sig Figs: 0.30 0.0054 3.70 800 800. ```

Answer 51

``` 2 2 3 1 3 ```

Question 52

What numbers in scientific notation are sig figs?

Answer 52

all of them

Question 53

Your confidence is a calculation is only as good as your _____?

Answer 53

worst measurement

Question 54

Sig Figs for addition and subtraction?

Answer 54

least number of decimals = decimals in answer

Question 55

Sig Figs for multiplying and dividing?

Answer 55

the least number of sig figs = sig figs in the answer

Question 56

What do you do when you round with a 5?

Answer 56

round up

Question 57

on what tools is very digit significant?

Answer 57

printed tolerance | error

Question 58

What is an exact number?

Answer 58

a number with no uncertainty

Question 59

How many sig figs does an exact number have?

Answer 59

infinite

Question 60

When do we consider sig figs in the conversions?

Answer 60

metric to us

Question 61

what is the system called where u convert with factors of 10 and its based on prefixes?

Answer 61

SI units | metric to metric conversions