Chapter 1: Measuring Up

Question 1

Chemistry is the study of what?

Answer 1

Matter

Question 2

What is matter?

Answer 2

anything that has mass and takes up space

Question 3

What is a unit?

Answer 3

a quantity that describes the measurement being made

Question 4

True/false: NEVER list the unit in an answer

Answer 4

False

Question 5

Define significant figure

Answer 5

a digit in a measurement that contributes to the measurement’s precision

Question 6

How many significant figures are in the following number:

a. 0.01020
b. 12,007
c. 609,000
d. 89.10400

Answer 6

a. 4
b. 5
c. 3
d. 7

Question 7

What is the difference between accuracy and precision?

Answer 7

accuracy: indicates how correct the measurement is
precision: determined by the instrument used to make a measurement

Question 8

When adding and subtracting, should the answer be based on precision or significant figures?

Answer 8

Precision

Question 9

Solve correctly:

102cm-15.423cm=?

Answer 9

87cm

Question 10

When multiplying and dividing numbers, should the answer be based on precision or significant figures?

Answer 10

Significant figures

Question 11

Solve correctly:

7.0in•4.209in=?

Answer 11

29 inches squared

Question 12

True/false: there is never a degree of error in the last significant figure?

Answer 12

false

Question 13

centi means?

Answer 13

.01

Question 14

kilo means?

Answer 14

1000

Question 15

milli means?

Answer 15

.001

Question 16

1 cm cubed equals how many mL?

Answer 16

1 mL

Question 17

define weight

Answer 17

a measure of how strongly gravity pulls on an object

Question 18

define mass

Answer 18

a measure of how much matter exists in an object.

Question 19

density equals what?

Answer 19

mass/volume

Question 20

define density

Answer 20

a measure of how tightly packed the matter in a substance is

Question 21

What is the density of water?

Answer 21

1.0 g/mL