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Chem101 > Chapter 1 > Flashcards

Chapter 1 Flashcards

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
Q

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

A

G

10^9

26
Q

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

A

M

10^6

27
Q

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

A

k

10^3

28
Q

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

A

d

10^-1

29
Q

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

A

c

10^-2

30
Q

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

A

m

10^-3

31
Q

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

A

μ

10^-6

32
Q

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

A

n

10^-9

33
Q

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

A

p

10^-12

34
Q

Weight

A

force exerted on an object due to gravity

35
Q

mass

A

measurement of matter in an object

36
Q

atomic mass unity (amu)

A

exactly 1/12 of the mass of one carbon-12 atom

37
Q

angstrom ( Å)

A

measure of 1X10^-10m.

38
Q

Two temps used in chem

A

Celcius and Kelvins

39
Q

Conversion formula K to Celc

A

K = C + 273.15

40
Q

Conversion formula F to C

A

Temp F = 9F/5C * (temp in C) + 32F

41
Q

Derived SI unit for volume

A

meter cubed
liter(L) is more used
milliliter(mL) is also used

42
Q

Liter = cubic ___

A

decimeter (which is 1/10 of a meter)

43
Q

Milliliter = cubic ___

A

centimeter

44
Q

Two kinds of measurements

A

exact and inexact

45
Q

Last digit in a measured number

A

uncertain digit

46
Q

How to Avoid rounding errors

A

Do not round until the end of the multi step equation (leave at least more than one decimal)

47
Q

Accuracy

A

closeness to true value

48
Q

Precision

A

consistency of measurement

49
Q

conversion factor: How to use

A

fraction with same quantity expressed so that what you want is on top, what you want cancelled out is on the bottom.

50
Q

Dimensional conversion

A

series of unit conversions used in the solution of a multistep problem

51
Q

Class of Matter

A

Pure or mixed substance

52
Q

Substance

A

form of matter that has a specific comp and distinct observable properties

53
Q

States of matter

A

solid, liquid, gas

54
Q

Mixture

A

combo of two or more substances that retain their own identity; can be separated without changing the identities of individual substances

55
Q

homogenous mix

A

uniform comp

56
Q

heterogenous mix

A

nonuniform comp

57
Q

Properties of substance

A

qualitative; quantitative

58
Q

physical property

A

observed without changing identity of a substance
color
boiling point
physical state

59
Q

chemical property

A

observation with chem change

rust

60
Q

extensive property

A

property depending on the amount of matter involved

i.e:
density and volume are additive.

61
Q

intensive property

A

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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