ch 1 intro to matter, energy, and measurements

Question 1

why is chem called the central science?

Answer 1

chem is the central science because its concepts are at the core of other sciences and applied sciences

Question 2

composition

Answer 2

elements present and how they are bonded together

Question 3

properties

Answer 3

how do molecules behave by themselves and with others

Question 4

measurements

Answer 4

many properties are quantitative, understanding units of measurement, and properties measured. understand how we can use these elements

Question 5

units of measurement

Answer 5

• metric system is used as the system of measurement in most countries
• systeme international d’unites, or SI units have seven based units from which all others are derived
• a different base unit is used for each quantity

Question 6

mass

Answer 6

kilogram = kg

Question 7

length

Answer 7

meter = m

Question 8

time

Answer 8

second = s^a

Question 9

temperature

Answer 9

kelvin = K

Question 10

amount of substance

Answer 10

mole = mol

Question 11

electric current

Answer 11

ampere = A

Question 12

luminous intensity

Answer 12

candela = cd

Question 13

metric system

Answer 13

prefixes convert the base units that are appropriate for the item being measured. the base unit can be any unit (ex: meters: gigameter, nanometer, etc)

Question 14

giga

Answer 14

G = 1 x 10^9

Question 15

mega

Answer 15

M = 1 x 10^6

Question 16

kilo

Answer 16

k = 1 x 10^3

Question 17

deci

Answer 17

d = 10^-1
1 decimeter (dm) = 0.1 m

Question 18

centi

Answer 18

c = 10^-2
1 centimeter (cm) = 0.01 m

Question 19

mili

Answer 19

m = 10^-3
1 millimeter (mm) = 0.001 m

Question 20

micro

Answer 20

u^a = 10^-6
1 micrometer (um) = 1 x 10^-6 m

Question 21

nano

Answer 21

n = 10^-9
1 nanometer (nm) = 1 x 10^-9 m

Question 22

pico

Answer 22

P = 10^-12
1 picometer (pm) = 1 x 10^-12m

Question 23

femto

Answer 23

f = 10^-15
1 femtometer (fm) = 1 x 10^-15 m

Question 24

water boiling and freezing points

Answer 24

boiling: 212 f
freezing: 32 f

Question 25

fahrenheit to celsius

Answer 25

5/9 x (f-32) = c