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CHM020 - Analytical Methods for Biology > Chapter 0b > Flashcards

Chapter 0b Flashcards

1
Q

standard system of measurement used in chemistry

A

metric system

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2
Q
  • modification of the metric system as a worldwide standard
  • official system of measurement used throughout the world for units of length, volume, mass, temperature, and time
A

International System of Units (SI)

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3
Q

metric:
length

A

meter (m)

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4
Q

SI:
length

A

meter (m)

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5
Q

metric:
volume

A

liter (L)

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6
Q

SI:
volume

A

cubic meter (m^3)

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7
Q

metric:
mass

A

gram (g)

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8
Q

SI:
mass

A

kilogram (kg)

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9
Q

metric:
temperature

A

degree Celsius (°C)

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10
Q

SI:
temperature

A

kelvin (K)

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11
Q

metric:
time

A

second (s)

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12
Q

SI: time

A

second (s)

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13
Q

1 meter = __ in

A

39.4 in.

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14
Q

1 meter = __ yd

A

1.09 yd

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15
Q

space occupied by a substance

A

volume

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16
Q

1 L = __ qt

A

1.06 qt

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17
Q

__ mL = 1 qt

A

946 mL

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18
Q

used to measure small volumes

A

graduated cylinder

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19
Q

measure of quantity of material it contains

A

mass

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20
Q

how hot or cold something is

A

temperature

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21
Q

Kelvin to Celcius

A

Kelvin = Celsius + 273.15.

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22
Q

Fahrenheit to Celsius

A

°F = °C×(9/5)+32

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23
Q

measure in units such as years, days, hours, minutes, seconds

A

time

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24
Q

measured by observing the marked lines at the end of a ruler

A

length

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25
numbers obtained when you measure a quantity such as your height, weight, or temperature
measured numbers
26
all the digits, including the estimated digit
significant figures (SFs)
27
significatn figures are used to represent what
amount of error associated with a measurement
28
- not measured and do not have a limited number of significant figures - obtained by counting - definitions that compare two units - definitions in the same measuring system
exact numbers
29
helpful in working problems and doing calculations faster
calculator
30
writing significant figures: multiplication or division
measure with fewest SIGNIFICANT FIGURES
31
writing significant figures: addition or subtraction
measurement with fewest DECIMAL PLACES
32
placed in front of any unit to increase or decrease its size by some factor of ten
prefix
33
peta
10^15
34
tera
10^12
35
giga
10^9
36
mega
10^6
37
kilo
10^3
38
deci
10^-1
39
centi
10^-2
40
milli
10^-3
41
micro
10^-6
42
nano
10^-9
43
pico
10^-12
44
femto
10^-15
45
volume of a cube whose dimensions are 1cm on each side
cubic centimeter (cm^3)
46
cube measuring 10cm on each side has a volume of __
1000 cm^3
47
- use two different units to describe the same measured amount - are written for relationships between units of the metric system, U.S. units, or between metric and U.S. units
equlities
48
1lb = oz
16 oz
49
1 kg = lb
2.20 lb
50
1 in. = cm
2.54 cm
51
1 m = in.
39.4 in
52
1 km = mi
0.621
53
1 qt = mL
946 mL
54
1L = qt
1.06 qt
55
1pt = mL
473 mL
56
1lb = g
454 g
57
"dose is the difference between a poison and a cure"
Paracelsus
58
compares the mass of an object to its volume
density
59
density formula
mass/volume
60
- relationship between the density of a substance and the density of water - unitless quantity
specific gravity
61
specific gravity formula
density of sample / density of water
62
density of water
1.00 g/mL at 4C

CHM020 - Analytical Methods for Biology (22 decks)

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