Chapter 4: How Chemists Use Numbers

Question 1

What is the SI unit of time?

Answer 1

seconds

Question 2

what is the SI unit of mass?

Answer 2

grams

Question 3

what is the SI unit of temperature?

Answer 3

Kelvin

Question 4

what is the SI unit of length?

Answer 4

meters

Question 5

what is the SI unit of volume?

Answer 5

liters

Question 6

1 kg = ___ g

Answer 6

1,000

Question 7

1 g = ____ cg

Answer 7

100

Question 8

1 g = ____ mg

Answer 8

1,000

Question 9

1 g = ____ micrograms

Answer 9

10^6

Question 10

1 g = ____ nanograms

Answer 10

10^9

Question 11

what measures the amount of matter in an object?

Answer 11

mass

Question 12

T/F: mass is the same thing as weight

Answer 12

false

Question 13

are leadings zeros significant?

Answer 13

no (they serve as placeholders)

Question 14

are trailing zeros WITH a decimal point significant?

Answer 14

yes

Question 15

are “sandwiched” zeros significant?

Answer 15

yes

Question 16

when you multiply or divide, the sigfigs if your final answer equal:

Answer 16

the amount of sigfigs in the smallest amount from the problem

Question 17

when you add or subtract, the sigfigs in your final answer equal:

Answer 17

the amount of sigfigs in the smallest amount from the problem

Question 18

1 cm^3= ___ mL

Answer 18

1 mL

Question 19

1 cc= ____mL

Answer 19

1 mL

Question 20

1 in = ____ cm

Answer 20

2.54 cm

Question 21

density=

Answer 21

mass/volume

Question 22

bricks are ____ dense than feathers

Answer 22

more