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Chemistry Final
Chemistry Final
60 terms
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#chemistry #final #wcs #mr.rodriguez
Flashcards
60 cards
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Questions
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Answers
1
what happens to the temperature of a sample of ice at its melting points as it melts?
it remains the same
if falls
it rises
it depends on the pressure
2
if you are collecting a gas by water displacement you must remember to adjust for_____ pressure
atmospheric
partial
water
vapor
3
which of these typically has the lowest density?
gas
solid
liquid
metal
4
the uniform mixing and spreading of gasses over time is known as ______.
diffusion
expansibility
compressibility
density
5
for a constant quantity of gas at constant pressure, if you decrease thetemperature the volume?
alternate
increase
decrease
stay the same
6
what volume does any gas occupy at STP
22.4 L
1 L
0.0224 L
6.022 L
7
Choose the name for the chemical formula CaCl
2
calcium chlorite
calcium chlorate
monocalcium dichloride
calcium chloride
8
because a gas easily mingles with porous substances it exhibits _______.
compressibility
permeability
elasticity
effusion
9
the ____ represents the number of moles of each substance in a reaction.
electronegativity values
ions
coefficients
oxidation numbers
10
what do we call the specific temperature and pressure where water can exist in all three phases
liquid-solid-gas point
triple point
critical temperature
normal boiling point
11
what phase change skips the liquid stage
none of these
deposition
condensation
evaporation
12
melting occurs when a
gas becomes a solid
gas becomes a liquid
liquid becomes a solid
solid becomes a liquid
13
the reason that alcohol evaporates much faster than mercury does is due to differences in?
viscosities
crystalline structures
vapor pressure
surface tension
14
for a constant amountof gas atconstant temperature if you decrease the volume the pressure will
decrease
swerve
increase
stay the same
15
what is the oxidation number of Pb in PbO
2
2
4
-2
-4
16
what type of formula best represents the arrangement of bonds in a molecule?
ionic
empirical
molecular
structural
17
what is the oxidation number of C in C
6
H
6
2
-1
1
-2
18
which gas law is represented by PV=nRT?
Gay-Lussac's law
ideal gas law
Avogadro's law
combined gas law
19
the temperature at which the vapor pressure of a substance equals 760 torr is called _____.
critical pressure point
critical temperature
melting point
normal boiling point
20
in the equation PV=nRT, n represents the number of _______.
types
moles
molecules
grams
21
the process by which mixtures can be separated using vaporization and condensation is called
fractionization
dynamic vaporization
boiling
distillation
22
celsius temperatures that are used in gas law problems must be
converted to K
corrected for pressure
converted to F
corrected for volume
23
the main reason that high pressure can squeeze gasses into smaller volumes is that gases are?
expansible
elastic
permeable
compressible
24
Which of the following does not represent a function of a balanced equation
identifies all substances involved in the reaction
shows the composition of the substance involved
indicates the mass of products and reactants
accounts for all atoms involved in the reaction
25
the reaction 2NaCl+H
2
SO
4
→ Na
2
SO
4
+2HCl
double replacement
single replacement
synthesis
decompostion
26
choose the name for the chemical formula HCl (aq)
hydrogen chloride
hydrogen monochloride
hydrogen monochlorate
hydrochloric acid
27
one mole of water contains ____ of hydrogen and ____ of oxygen atoms
one mole/ one mole
two moles/ one mole
one mole/ two moles
two moles/ two moles
28
when a gas moves through a tiny opening into an evacuated chamber _______ is occurring
elasticity
permeability
effusion
compressibility
29
the greek prefix penta- means
6
3
4
5
30
choose the name for the chemical formula HBrO
bromic acid
perbromic acid
hypobromous acid
bromous acid
31
the stock system a naming of ionic compounds that contain a metal with multiple oxidation uses
arabic numerals
coefficients
roman numerals
none of these
32
Hydrogen bonds can occur between molecules containing hydrogen and _____.
sulfur
bromine
oxygen
carbon
33
gas inside a fixed volume, if you increase the temperature the pressure will
plateau
increase
decrease
stay the same
34
which of the following is not a prediction of the kinetic-molecular theory
gas particles are separated by great distances
gas particles do not interact except during collisions
gas particles lose energy when colliding
gas particles move randomly and rapidly
35
if you were to freeze neon, a noble gas, it would form _______ crystals
atomic
covalent
covalent molecular
ionic
36
which of the following is the correct value for avogadro's number
6.22 × 1023
6.23 × 1022
6.022 × 1023
6.023×1022
37
what is the chemical formula for sodium iodide
NaI
NaIO
NaIO3
NaIO2
38
What is the oxidation number of the alkaline-earth metals?
1
-2
-1
2
39
choose the name for the chemical formula KClO
3
potassium chloride
potassium chlorate
potassium chlorite
potassium trichloride
40
formula that tells you what elects are present and gives the simplest ratio
molecular
structural
empirical
mathematical
41
the reaction TiCl
4
+4Na→Ti+4NaCl is a _____ reaction.
single replacement
double replacement
synthesis
decompostion
42
the reaction 2AlCl
3
→ 2Al + 3Cl
2
is a _____ reaction.
single replacement
decomposition
synthesis
double replacement
43
what is the chemical formula for carbon disulfide
CS
CS2
CaS2
CIS
44
compounds consisting of one metal and one nonmetal are called ________.
binary acids
binary ionic compounds
polyatomic ionic compounds
binary covalent compound
45
normal atmospheric pressure at sea level is approximately
15.7 psi
all of these
1 atm
766 mm Hg
46
what is the term for a liquid's resistance to flowing
permeability
capillary action
diffusibility
viscosity
47
liquids are similar to gasses in all of the following except
diffusibility
permeability
fluidity
compressibility
48
______ is demonstrated when a gas quickly expands to fill a low pressure region.
elasticity
expansibility
compressibility
permeability
49
which represents standard temperature and pressure
0 K and 760 mm Hg
273 K and 1 atm
273 K and 445 psi
0oF and 2 atm
50
find the molar mass of NaCl
49.46g
55.63g
68.34g
58.44g
51
a compound that contains water molecules in its crystalline structure is called an ______.
oxyanion
anhydrate
binary acid
hydrate
52
choose the name for the compound P
2
O
5
phosphorus oxide
biphosphorus pentoxide
diphoshorus pentoxide
biphosphorus pentioxygen
53
what is released when gaseous particles form crystals
latent heat
sensible heat
lattice energy
heat of fusion
54
the compound NH
3
demonstrates which kind of intermolecular forces?
hydrogen bonds
all of these
dipole-dipole forces
dispersion forces
55
what is the oxidation number of atoms in pure elements
0
2
1
-1
56
the reaction 4Fe+ 3O
2
→2Fe
2
O
3
is a _____ reaction.
decomposition
double replacement
synthesis
single replacement
57
the ______ yield is the maximum amount of product that could be created from a given amount
actual
theoretical
percent
empirical
58
which of the following statements about evaporation is not true?
it is a cooling process
the higher vapor pressure the slower the rate of evaporation
it can occur at any temperature
occurs on the surface
59
which principle states that there ration of elements in a compound is constant
law of definite composition
law of multiple proportions
law of conservation of matter
second law of thermodynamics
60
what is the term for the curved surface of a liquid
polymer
meniscus
chromosome
capillary