Chapter 2

Question 1

nano symbol/factor (10^x)

Answer 1

n/10^-9

Question 2

micro symbol/factor (10^x) symbol is backwards y

Answer 2

backwards y/10^-6

Question 3

milli symbol/factor (10^x)

Answer 3

m/10^-3

Question 4

centi symbol/factor (10^x)

Answer 4

c/10^-2

Question 5

kilo symbol/factor (10^x)

Answer 5

k/10^3

Question 6

length SI name/symbol

Answer 6

meter/m

Question 7

mass SI name/symbol

Answer 7

kilogram/kg

Question 8

time SI name/symbol

Answer 8

second/s

Question 9

temp SI name/symbol

Answer 9

kelvin/k

Question 10

amount SI name/symbol

Answer 10

mole/mol

Question 11

what do you cancel out in conversion factors?

Answer 11

units

Question 12

density equation

Answer 12

D=m/v

Question 13

what do you round to with adding/subtracting

Answer 13

smallest amount of decimal places

Question 14

what do you round to with multiplication/division

Answer 14

smallest amount of significant figures

Question 15

express with appropriate prefix: 0.000000005m

Answer 15

5nm

Question 16

how many sig figs: 930900

Answer 16

4

Question 17

how many sig figs: 0.00240

Answer 17

3

Question 18

how many sig figs: 930900.

Answer 18

6

Question 19

how many sig figs: 0.000000429

Answer 19

3

Question 20

solve and round to correct amount of number places: 54.26+8.024

Answer 20

62.28

Question 21

solve and round to correct amount of number places: 11.11x0.28

Answer 21

3.1

Question 22

use dimensional analysis to solve for how many seconds are in 4 hours

Answer 22

14400s

Question 23

a nurse wants to administer morphine to a boy that weighs 62lbs and the dose is listed as 0.20 mg per kg of body weight. the medication contains 2.0mg in every 1.0mL. How many milliliters should be given? (2.2lbs=1kg) pay attention to sig figs

Answer 23

2.8mL

Question 24

a capsule contains 80wt% caffeine, write this percentage as a conversion factor.

Answer 24

80g caffeine/100g capsule

Question 25

if you eat a 50g serving of salmon, how much omega-3 fatty acids are you consuming? (1.9g o-3/ 100g salmon) unit is g o-3

Answer 25

.95g o-3

Question 26

for a reaction 5.0g of liquid ethanol is required. what volume of ethanol is required if the density is 0.7893g/mL?

Answer 26

6.3mL

Question 27

the lethal dose of pure ethanol is 234mL. what mass of ethanol is the lethal dose? density of 0.7893g/1mL

Answer 27

185g