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Chem101 > Chapter 1 > Flashcards

Chapter 1 Flashcards

(61 cards)

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1
Q

What is chemistry ?

A

Study of matter and changes that matter undergoes.

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2
Q

Macroscopic means

A

It can be seen with the naked eye

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3
Q

Submicroscopic

A

molecular level

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4
Q

scientific method (SM)

A

systematic approach to experimentation

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5
Q

Observation: SM

A

gathering data

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6
Q

Observation: Laws

A

natural phenoms that are universally consistent

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7
Q

Hypothesis: SM

A

explanation for an observation

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8
Q

Experimentation: SM

A

test hypothesis one variable at a time

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9
Q

Theory: SM

A

conceptual assumps based on data from accumulated experiments

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10
Q

Further experimentation: SM

A

test prediction based on model

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11
Q

Instrument for Length

A

Meterstick

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12
Q

Instrument for Volume

A

Burette, pipette, graduated cylinder, volumetric flask

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13
Q

Instrument for mass

A

Balance

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14
Q

Instrument for temp

A

thermometer

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15
Q

Qualitative property

A

can be measured with numbers

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16
Q

Two systems of measurement; Which one used for scientific measurements?

A

English and metric system; metric system

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17
Q

Measurement: Length
Name of unit:
Symbol:

A

meter

m

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18
Q

Measurement: mass
Name of unit:
Symbol:

A

kilogram

kg

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19
Q

Measurement: time
Name of unit:
Symbol:

A

second

s

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20
Q

Measurement: electric current
Name of unit:
Symbol:

A

amperes

A

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21
Q

Measurement: temperature
Name of unit:
Symbol:

A

kelvin

K

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22
Q

Measurement: amount of substance
Name of unit:
Symbol:

A

mole

mol

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23
Q

Measurement: luminous intensity
Name of unit:
Symbol:

A

candela

cd

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24
Q

Prefix SI units: Tera-
symbol:
base multiply by:

A

T

10^12

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25
Prefix SI units: Giga- symbol: base multiply by:
G | 10^9
26
Prefix SI units: Mega- symbol: base multiply by:
M | 10^6
27
Prefix SI units: kilo- symbol: base multiply by:
k | 10^3
28
Prefix SI units: deci- symbol: base multiply by:
d | 10^-1
29
Prefix SI units: centi- symbol: base multiply by:
c | 10^-2
30
Prefix SI units: milli- symbol: base multiply by:
m | 10^-3
31
Prefix SI units: micro- symbol: base multiply by:
μ | 10^-6
32
Prefix SI units: nano- symbol: base multiply by:
n | 10^-9
33
Prefix SI units: pico- symbol: base multiply by:
p | 10^-12
34
Weight
force exerted on an object due to gravity
35
mass
measurement of matter in an object
36
atomic mass unity (amu)
exactly 1/12 of the mass of one carbon-12 atom
37
angstrom ( Å)
measure of 1X10^-10m.
38
Two temps used in chem
Celcius and Kelvins
39
Conversion formula K to Celc
K = C + 273.15
40
Conversion formula F to C
Temp F = 9F/5C * (temp in C) + 32F
41
Derived SI unit for volume
meter cubed liter(L) is more used milliliter(mL) is also used
42
Liter = cubic ___
decimeter (which is 1/10 of a meter)
43
Milliliter = cubic ___
centimeter
44
Two kinds of measurements
exact and inexact
45
Last digit in a measured number
uncertain digit
46
How to Avoid rounding errors
Do not round until the end of the multi step equation (leave at least more than one decimal)
47
Accuracy
closeness to true value
48
Precision
consistency of measurement
49
conversion factor: How to use
fraction with same quantity expressed so that what you want is on top, what you want cancelled out is on the bottom.
50
Dimensional conversion
series of unit conversions used in the solution of a multistep problem
51
Class of Matter
Pure or mixed substance
52
Substance
form of matter that has a specific comp and distinct observable properties
53
States of matter
solid, liquid, gas
54
Mixture
combo of two or more substances that retain their own identity; can be separated without changing the identities of individual substances
55
homogenous mix
uniform comp
56
heterogenous mix
nonuniform comp
57
Properties of substance
qualitative; quantitative
58
physical property
observed without changing identity of a substance color boiling point physical state
59
chemical property
observation with chem change | rust
60
extensive property
property depending on the amount of matter involved i.e: density and volume are additive.
61
intensive property
property not depending on the amount of matter involved i.e: density and melting point are not additive.

Chem101 (9 decks)

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