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Gen chem 1 > Final Exam Review (Chp 1-9) > Flashcards

Final Exam Review (Chp 1-9) Flashcards

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1
Q

refers to correctness of a single measurement

A

Accuracy

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2
Q

how closely grouped individual values are around average value

A

precision

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3
Q

estimated degree of error in measurement

A

Uncertainty in measurement

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4
Q

represent the limits of what values of a measurement or calculation we are sure of

A

significant figures

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5
Q

guess or estimate of where the object falls between the nearest graduations, found at end

A

uncertain digit

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6
Q

counterweight used in chemical analysis consists of an empty container that counterbalances the weight of container holding chemicals

A

tare

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7
Q

process used to separate mix of liquids and solids or two immiscible liquids

A

decant

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8
Q

summarizes a hypothesis and has been supported with repeated testing

A

theory

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9
Q

prediction of cause and effect, can be supported or refuted through experimentation or more observation

A

hypothesis

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10
Q

any substance that cannot be decomposed into simpler substances by ordinary chemical processes

A

element

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11
Q

generalizes body of observations, explain things but do not describe them

A

Law

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12
Q

any substance composed of identical molecules consisting of two or more chemical elements

A

Chemical compound

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13
Q

mixture of substances blended so well that you cannot see individual substances

A

homogenous

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14
Q

mixture with a non-uniform composition

A

heterogenous mixture

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15
Q

1 mL=

A

1 cm^3

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16
Q

1 in = cm

A

2.54cm

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17
Q

1kg =lbs

A

2.2lbs

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18
Q

how many g in 1 kg

A

1000

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19
Q

Density of H2O =

A

1.00 g/mL

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20
Q

What is the mass in grams of 10mL of water

A

10 grams

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21
Q

Length=

A

Meter (m)

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22
Q

Mass

A

Kilogram (kg)

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23
Q

Time

A

second (s)

24
Q

Temperature

A

Kelvin (K)

25
Q

Amount

A

Mole (mol)

26
Q

area

A

m^2, cm^2

27
Q

Volume

A

m^3, mL, L

28
Q

Density

A

g/mL, g/cm^3

29
Q

Force

A

(N)

30
Q

Pressure

A

N/m

31
Q

concentration

A

M

32
Q

Avogadro’s Number

A

6.022 x 10^23

33
Q

Which of the following measuring devices is most accurate

A

graduated cylinder

34
Q

central part of atom that contains protons and neutrons

A

nucleus

35
Q

atomic number of an element is same as

A

proton

36
Q

exist outside of the surrounding atom nucleus

A

electrons

37
Q

has no charge

A

neutrons

38
Q

fixed distances from the nucleus of an atom where electrons may be found

A

energy levels

39
Q

atomic mass unit

A

amu

40
Q

mass number

A

A

41
Q

group of atoms that have the same atomic numbers but different mass numbers

A

isotopes

42
Q

summing the masses of an element’s isotopes, each multiplies by its natural abundance on earth

A

average atomic mass

43
Q

mass of a sample divided by amount of substance

A

molar mass

44
Q

an atom or molecule that is positively charged

A

cation

44
Q

an atom or molecule that is negatively charged

A

anion

45
Q

radioactivity isotope have

A

high n/p ratios

45
Q

all elements with a Z>83 are

A

radioactive

46
Q

energy

A

J

47
Q

form of energy that on object or particle has by reason of its motion

A

kinetic energy

48
Q

any form of energy that is stores and can be released as work or heat

A

potential energy

49
Q

consists of two perpendicular waves, one electric and one magnetic, propagating at speed of light

A

electromagnetic radiation

50
Q

distance between any two consecutive identical points on the waveform

A

wavelength

51
Q

number of times an event occurs per unit of time

A

Frequency (1Hz= 1/s= s^-1)

52
Q

to limit the possible values of a magnitude or quantity to a discrete set of values by quantum mechanical rules

A

quantized

53
Q

contains every wavelength between the wavelength on which the spectrum starts and the wavelength on which the spectrum ends

A

continuous

54
Q
A

Gen chem 1 (2 decks)

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