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

Chapter 0b Flashcards

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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
Q

numbers obtained when you measure a quantity such as your height, weight, or temperature

A

measured numbers

26
Q

all the digits, including the estimated digit

A

significant figures (SFs)

27
Q

significatn figures are used to represent what

A

amount of error associated with a measurement

28
Q
  • 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
A

exact numbers

29
Q

helpful in working problems and doing calculations faster

A

calculator

30
Q

writing significant figures:
multiplication or division

A

measure with fewest SIGNIFICANT FIGURES

31
Q

writing significant figures:
addition or subtraction

A

measurement with fewest DECIMAL PLACES

32
Q

placed in front of any unit to increase or decrease its size by some factor of ten

A

prefix

33
Q

peta

A

10^15

34
Q

tera

A

10^12

35
Q

giga

A

10^9

36
Q

mega

A

10^6

37
Q

kilo

A

10^3

38
Q

deci

A

10^-1

39
Q

centi

A

10^-2

40
Q

milli

A

10^-3

41
Q

micro

A

10^-6

42
Q

nano

A

10^-9

43
Q

pico

A

10^-12

44
Q

femto

A

10^-15

45
Q

volume of a cube whose dimensions are 1cm on each side

A

cubic centimeter (cm^3)

46
Q

cube measuring 10cm on each side has a volume of __

A

1000 cm^3

47
Q
  • 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
A

equlities

48
Q

1lb = oz

A

16 oz

49
Q

1 kg = lb

A

2.20 lb

50
Q

1 in. = cm

A

2.54 cm

51
Q

1 m = in.

A

39.4 in

52
Q

1 km = mi

A

0.621

53
Q

1 qt = mL

A

946 mL

54
Q

1L = qt

A

1.06 qt

55
Q

1pt = mL

A

473 mL

56
Q

1lb = g

A

454 g

57
Q

“dose is the difference between a poison and a cure”

A

Paracelsus

58
Q

compares the mass of an object to its volume

A

density

59
Q

density formula

A

mass/volume

60
Q
  • relationship between the density of a substance and the density of water
  • unitless quantity
A

specific gravity

61
Q

specific gravity formula

A

density of sample / density of water

62
Q

density of water

A

1.00 g/mL at 4C

CHM020 - Analytical Methods for Biology (22 decks)

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