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Chemistry I > Chapter 1.4 Units of Measurement > Flashcards

Chapter 1.4 Units of Measurement Flashcards

1
Q

Quantitative

A

Refers to the many properties of matter associated with numbers

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2
Q

SI

A

Are the preferred units of the metric system

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3
Q

Prefixes of the metric system in order of largest to smallest

A 
From large to small ( multiply by 10)
From small to large ( divide by 10)
Giga    10^ 9
Mega.  10 ^6
Kilo.     10^3
Deca    10^2
Base
Deci.    10^-1. .1
Centi.   10^-2. .01
Milli.     10^-3. .001
Micro.  10^-6
nano     10^ -9

( GIGA/nano) multiple of 9
( Mega/ Micro) multiple of 6

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4
Q

The 7 base units are ( from which other units are derived

A
  1. Mass Kilogram kg
  2. Length. Meter m
  3. Time. Second. s or sec
  4. Temp. Kelvin. K
  5. Amt of sub. Mole. mol
  6. Electric curr. Ampere. A or amp
  7. Luminous intensity /Candela / Cd
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5
Q

UNIT

A

Is what specifies a measurement/quantity

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6
Q

WEIGHT

A

is the force that is exerted on an object’s mass by gravity

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7
Q

TEMPERATURE

A

Is the measure of the hotness or coldness of an object.

. It is a physical property that determines the direction of heat flow.

. A measure of the kinetic energy of the particles in a sample

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8
Q

How does heat flow

A

It flows spontaneously from a substance from higher temperature to lower temperature.

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9
Q

The 2 scales used to measure temperature are

A
  1. Kelvin

2. Celsius

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10
Q

Freezing and boiling points on a Celsius scale

A

Freezing 0 degrees C = 273.15 Kelvins

Boiling 100 degrees C

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11
Q

Freezing and boiling points on a kelvin scale

A

0 degrees K = -273.15 deg. C = ABSOLUTE ZERO

Boiling: 373.15

Kelvin scale is based on the properties of gases

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12
Q

KELVIN TO CELSIUS

A

C= K -273.15

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13
Q

Conversion Celsius to Kelvin

A

K = C+ 273.15

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14
Q

ABSOLUTE ZERO

A

0 degrees K = -273.15 deg. C

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15
Q

Freezing and boiling points on a fahrenheit scale

A

Freezing : 32 F

Boils : 212 F

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16
Q

Fahrenheit to Celsius

A

C= 5/9( F-32)

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17
Q

Celsius to Fahrenheit

A

F= 9/5 (C)+ 32

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18
Q

DERIVED UNITS

A

SI base units are use to get DERIVED UNITS

To do so we use the defining equation for the quantity, substituting the appropriate base units

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19
Q

the defining equation for SPEED

A

ratio: distance traveled / elapsed time = m/s ( meters per second) = a derived unit

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20
Q

2 egs of a derived unit

A

volume=L ( not a based unit/not a SI unit)

Density=

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21
Q

VOLUME OF A CUBE

A

l x l x l = length^3 = m^3 ( a derived unit formed from the base unit for length -> meter)

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22
Q

Volume units

A

m3
cc/ cm3
L= decimeter cubed dm3
1cm3=1ml

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23
Q

Mass

A

Is a measure of the amount of material in an object

24
Q

What units is density expressed

A

g/cm3 or g/ml

25
DENSITY
the amount of mass in a unit volume of substance ( which is temperature dependent- volume changes when a substance is heated or cooled) MASS/ VOLUME EXPRESSED IN GRAMS =g/ml It is a intensive physical property For a liquid it is g/ ml For a solid it is g/ cm3
26
1ml=
1cm3
27
HYPOTHESIS
TENTATIVE explanation
28
The density of water is
1.00g/ml
29
SCIENTIFIC LAW
A concise verbal statement or mathematical equation that summarizes a broad variety of observations and experiences. they are considered to be the basic rules under which nature operates
30
THEORY
if a hypothesis is sufficiently general and repeatedly effective in predicting results of future experiments, it is called a theory. 2. It is an explanation of the general causes of certain phenomena with considerable evidence or facts to support it. threes can never be proven only supported
31
WEIGHT
is the force that is exerted on an object's mass by gravity
32
UNIT
Is what specifies a measurement/quantity
33
How does heat flow
It flows spontaneously from a substance from higher temperature to lower temperature.
34
TEMPERATURE
Is the measure of the hotness or coldness of an object. . It is a physical property that determines the direction of heat flow.
35
Freezing and boiling points on a Celsius scale
Freezing 0 degrees C = 273.15 Kelvins | Boiling 100 degrees C
36
The 2 scales used to measure temperature are
1. Kelvin | 2. Celsius
37
KELVIN TO CELSIUS
C= K -273.15
38
Freezing and boiling points on a kelvin scale
0 degrees K = -273.15 deg. C = ABSOLUTE ZERO
39
ABSOLUTE ZERO
0 degrees K = -273.15 deg. C
40
Conversion Celsius to Kelvin
K = C+ 273.15
41
Fahrenheit to Celsius
C= 5/9( F-32)
42
Freezing and boiling points on a fahrenheit scale
Freezing : 32 F | Boils : 212 F
43
DERIVED UNITS
SI base units are use to get DERIVED UNITS To do so we use the defining equation for the quantity, substituting the appropriate base units
44
Celsius to Fahrenheit
F= 9/5 (C)+ 32
45
2 egs of a derived unit
volume=L ( not a based unit/not a SI unit) | Density=
46
the defining equation for SPEED
ratio: distance traveled / elapsed time = m/s ( meters per second) = a derived unit
47
Volume units
m3 cc/ cm3 L= decimeter cubed dm3 1cm3=1ml
48
VOLUME OF A CUBE
l x l x l = length^3 = m^3 ( a derived unit formed from the base unit for length -> meter)
49
What units is density expressed
g/cm3 or g/ml
50
DENSITY
the amount of mass in a unit volume of substance ( which is temperature dependent- volume changes when a substance is heated or cooled) MASS/ VOLUME EXPRESSED IN GRAMS =g
51
1ml=
1cm3
52
The density of water is
1.00g/ml
53
THEORY
if a hypothesis is sufficiently general and repeatedly effective in predicting results of future experiments, it is called a theory. 2. It is an explanation of the general causes of certain phenomena with considerable evidence or facts to support it. threes can never be proven only supported
54
HYPOTHESIS
TENTATIVE explanation
55
A liter is
A cube 1 decimeter long on each side | 1 L = dm3
56
SCIENTIFIC LAW
A concise verbal statement or mathematical equation that summarizes a broad variety of observations and experiences. they are considered to be the basic rules under which nature operates
57
A Mililiter
Is a cube 1 cm long on each side

Chemistry I (33 decks)

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