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Chem 1110 > Exam 1 > Flashcards

Exam 1 Flashcards

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0
Q

what colour is phosphorus?

A

red

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1
Q

what is chemistry?

A

the science of everything life

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2
Q

what colour is carbon?

A

black or clear (diamonds)

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3
Q

phosphorus reacting with oxygen equation

A

P+ O2 –> P2O5

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4
Q

organic substances are

A

things made of carbon and hydrogen

all can burn

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5
Q

non-organic substances are

A

metals

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6
Q

macroscopic matter

A

what we can see normally

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7
Q

particulate matter

A

what we can imagine/ see under microscope

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8
Q

symbolic matter

A

represented through chemical symbols

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9
Q

how many elements are currently recorded?

A

117

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10
Q

what is a chemical compound?

A

something composed of two or more atoms

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11
Q

what is a molecule?

A

a single element

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12
Q

what is an ionic compound?

A

a bonded compound composed of two or more ions

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13
Q

what is a molecule?

A

the smallest unit of a compound that retains the chemical characteristics of the compound

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14
Q

what is a molecular formula?

A

the composition of a molecule

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15
Q

physical properties include

A

colour, state, melting/boiling point, density (mass/unit of volume)

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16
Q

what are extensive properties

A

mass dependent upon amount of substance

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17
Q

what are intensive properties

A

density that does not depend upon amount of substance

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18
Q

what are physical properties a function of

A

intermolecular forces

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19
Q

physical properties are affected by

A

temperature

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20
Q

separation of density

A

decantation, centrifugation

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21
Q

separation of boiling point

A

distillation

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22
Q

separation of state of matter

A

filtration

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23
Q

separation of intermolecular forces

A

chromatography

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24
Q

separation of vapor pressure

A

evaporation

25
Q

separation of magnetism

A

magnets

26
Q

separation of solubility

A

filtration

27
Q

chemical properties

A

chemical changes

28
Q

kinetic energy

A

energy associated with movement, thermal (particulate level), electrical (movement of electrons in a conductor), wave motion, compression (acoustic).
matter is atoms and molecules in motion

29
Q

potential energy

A

an objects position, gravitational, energy stored, electrostatic energy (charged or partially charged particles), nuclear energy (fission, fusion)

30
Q

SI units (metric system)

A 
mass-kg
length-m
time-s
amount of substance- mol
electric current - ampere - A
Luminous Intensity- candela- cd
31
Q

precision definition

A

how well several determinations of the same quantity are found

32
Q

accuracy is reflected by the

A

experimental error

33
Q

accuracy

A

the agreement of a measurement with the accepted value of the quantity

34
Q

percent error

A

experimental value - accepted value
——————————————x 100
accepted value

35
Q

giga

A

G 10^9

36
Q

mega

A

M 10^6

37
Q

kilo

A

k 10^3

38
Q

deci

A

d 10^-1

39
Q

centi

A

c 10^-2

40
Q

milli

A

m 10^-3

41
Q

micro

A

u 10^-6

42
Q

nano

A

n 10^-9

43
Q

pico

A

p 10^12

44
Q

femto

A

f 10^-15

45
Q

energy

A

the capacity to do work (joules), calories

46
Q

atomic number is equal to

A

of protons and # of electrons

47
Q

Dalton

A

theory that atoms were indestructable

48
Q

of neutrons

A

atomic mass- # of protons

49
Q

nucleus mass vs size

A

only small part of atom but most of mass

50
Q

amu

A

1.67 * 10^-24g and the unit is u for mass number (ie. 14 u)

51
Q

elements without isotopes and mass vs. atomic

A

mass is double the atomic number

52
Q

elements with one or more atoms with different numbers of neutrons

A

isotopes

53
Q

density of solids and liquids expressed in

A

grams per cubic centimeter g/cm^3

54
Q

density of gases expressed in

A

g/L

55
Q

Mass equation

A

volume x density

56
Q

calorie in Joules

A

4.184J

57
Q

Kcal=Cal but what is cal

A

10^3 cal = 1Cal

58
Q

C to K

A

add 273.15 to C

59
Q

hydrogen isotopes

A

h-1=protium
h-2=deuterium
h-3=tritium

60
Q

percent abundance

A

number of atoms of an individual isotope
——————————————————- x100
total # of atoms of all isotopes of that element

61
Q

stoichiometry

A

branch of chemistry that deals with mole proportions of chemical reactions

Chem 1110 (1 decks)

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