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Chemm 112 > final > Flashcards

final Flashcards

1
Q

law of conservation of mass

A

matter can neither be created or destroyed

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2
Q

law of definite proportions

A

all samples from any source has the same proportions as its other elements

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3
Q

law of multiple proportions

A

ratios

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4
Q

metals form

A

cations

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5
Q

nonmetals form

A

anions

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6
Q

metals (2)

A

good conductors of heat/electricity

tend to lose elections

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7
Q

nonmetals (2)

A

poor conductors of heat/electricity

gain electrons

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8
Q

noble gases

A

unreactive

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9
Q

alkali metals

A

reactive

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10
Q

alkaline earth metals

A

kinda reactive

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11
Q

halogens

A

reactive nonmetal

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12
Q

decreasing volume

A

lower moles of gas

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13
Q

increasing volume

A

higher moles of gas

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14
Q

if delta H is negative… (2)

A

it emits heat

also is a product

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15
Q

if delta H is positive … (2)

A

it absorbs heat

also is a reactant

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16
Q

increasing temp when delta H is negative would shift reaction to the …

A

left

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17
Q

decreasing temp when delta H is negative would shift the reaction to the …

A

right

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18
Q

increasing temp when delta H is positive would shift the reaction to the ..

A

right

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19
Q

decreasing temp when delta H is positive would shift the reaction to the …

A

left

20
Q

if Q > K the reaction will be in …

A

reverse

21
Q

if Q less than K

A

forward

22
Q

if Q = 0 the reaction contains only …

A

reactants

23
Q

if Q = infinity the reaction contains only …

A

products

24
Q

when K > 1

A

[products] higher than [reactants]

25
Q

when K less than 1

A

higher [reactant] than [products]

26
Q

boyles law

A

p1v1 = p2v2

27
Q

charles law

A

v1/t1 = v2/t2

28
Q

avagadros law

A

v1/n1 = v2/n2

29
Q

molar volume at STP

A

22.4L

30
Q

formula for density of ideal gas

A

molar mass / molar volume

31
Q

another formula for density of ideal gas

A

d = PM/RT

M is molar mass

32
Q

lattice energy

A

the strength of bonds in an ionic compound = the amount of energy required to separate the ionic compound into separate gaseous ions

33
Q

formal charge

A

valence elections - nonbonding - 1/2 bonding

34
Q

physical properties

A

smell, taste, color, appearance melting point, boiling point

35
Q

chemical properties

A

corrosives, flammability, acidity, toxicity

36
Q

physical change

A

evaporating, boiling, dissolving

37
Q

chemical change

A

rust, burning

38
Q

multiplying/dividing sig figs

A

result has the lowest sig figs

39
Q

adding/subtracting sig figs

A

result has the lowest number after decimal

40
Q

accuracy

A

how close a measurement is to actual value

41
Q

precision

A

how close repeated measurements are to each other

42
Q

most gases are polar/nonpolar

A

nonpolar

43
Q

increasing reactant concentration

A

Q less than K

44
Q

decreasing reactant concentration

A

Q > K

45
Q

increasing product concentration

A

Q > K

46
Q

decreasing product concentration

A

Q less than K

Chemm 112 (2 decks)

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