Chapter Review

Question 1

The Fundamental SI Units Electric

Current

Answer 1

ampere (A)

Question 2

The Fundamental SI Units

Amount of Substance

Answer 2

mole

Question 3

The Fundamental SI Units

Luminous intensity

Answer 3

candela (cd)

Question 4

The Prefixes Used in the SI System

exa

Answer 4

E
10¹⁸

Question 5

The Prefixes Used in the SI System

peta

Answer 5

P
10¹⁵

Question 6

The Prefixes Used in the SI System

tera

Answer 6

T
10¹²

Question 7

The Prefixes Used in the SI System

giga

Answer 7

G
10⁹

Question 8

The Prefixes Used in the SI System

pico

Answer 8

p
10^-12

Question 9

The Prefixes Used in the SI System

femto

Answer 9

f
10^-15

Question 10

The Prefixes Used in the SI System

atto

Answer 10

a
10^-18

Question 11

Significant Figure Rules

1. Nonzero integers

Answer 11

Nonzero integers always count as significant figures.

Question 12

Significant Figure Rules

2. Zeros
   a) leading zeros (define as well)

Answer 12

Leading zeros: zeros that precede all the nonzero digits.

Do not count as significant figures

Question 13

Significant Figure Rules

How many sig figs in 0.0025?

Answer 13

2

Question 14

Significant Figure Rules

2. Zeros
   b) captive zeros (define as well)

Answer 14

captive zeros: zeros between nonzero digits.

These always count as significant figures.

Question 15

Significant Figure Rules

How many sig figs in 1.008?

Answer 15

4

Question 16

Significant Figure Rules

2. zeros
   c) Trailing zeros (define as well)

Answer 16

trailing zeros: zeros at the right end of the number.

They are significant ONLY if the number contains a decimal point.

Question 17

Significant Figure Rules

How many sig figs in 100?

Answer 17

1

Question 18

Significant Figure Rules

How many sig figs in 1.00x10²?

Answer 18

3

Question 19

Significant Figure Rules

How many sig figs in 100. ?

Answer 19

3

Question 20

Significant Figure Rules

3. Exact numbers

Answer 20

Numbers assumed to have infinite sig figs, not obtained by a measurement device.

ex. 2 in 2πr
1 inch = 2.54 cm (EXACT)

Question 21

Significant Figure Rules

For addition and subtraction, result has…

Answer 21

SAME NUMBER OF DECIMAL PLACES AS THE LEAST PRECISE MEASUREMENT.

Question 22

Significant Figure Rules

example:

23.91168 + 7.83

Answer 22

31.74

Question 23

Significant Figure Rules

For multiplication or division, the number of sig figs is…

Answer 23

THE SAME AS THE NUMBER IN THE LAST PRECISE MEASUREMENT.

Question 24

Significant Figure Rules

example

1.332*5.5=

Answer 24

7.3

Question 25

Kelvin → Celsius

Answer 25

T_K = T_C + 273.15

Question 26

Celsius → Fahrenheit

Answer 26

T_C = (T_F - 32°F) * (5°C/9°F)

Question 27

At what temperature are Celsius and Fahrenheit equal?

Answer 27

-40°

Question 28

Distillation

Used to separate heterogenous/homogenous

Answer 28

homogenous

Question 29

Filtration

Used to separate heterogenous/homogenous

Answer 29

heterogenous

Question 30

Chromatography

Used to separate heterogenous/homogenous

Answer 30

homogenous