Straighterline CHEM101 Final exam with correct answers 2024
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Course
Straighterline CHEM10
Institution
Straighterline CHEM10
Mass Number correct answers total number of neutrons and protons in an atom; # protons + # electrons
p correct answers Most nonmetallic elements are found in which block of the periodic table?
Positive matter is concentrated in the central core correct answers Ernest Rutherford disproved J...
Mass Number correct answers total number of neutrons and protons in
an atom;+##
protons
electrons
p correct answers Most nonmetallic elements are found in which block of
the periodic
table
?
Positive matter is concentrated in the central core correct answers Ernest
Rutherford
disproved J.J. Thomson's plum-pudding model of the atom by
showing that...
Potassium correct answers Plants use up copious amounts of which
alkali metal,most of it from being washed out
preventing
to sea?
2:1:1:2 correct answers What is the ratio of reactants and products in
the chemical
equation
?
NaOH + H2SO4 -->
Na2SO4 + H2O
the number of ATOMS in 12g of
Carbon-12
1 g = 6.022 × 1023 amu correct answers What is Avogadro's
number?
Mg correct answers What is the reducing agent in the following
equation?
Mg(s) + 2HCl(aq) -> MgCl2(aq) +
H2(g)
(s) < (l) < (g) correct answers Which arrangement accurately describes
the standard
entropy values at different
phases?
2, 8, 20, 50, 82 or 126 protons correct answers What are the most stable
isotopes?
S=
oxidized
N = reduced correct answers What element has been oxidized and what
element has
been
reduced?
3CuS + 8HNO3 --> 3CuSO4 + 8NO +
4H2O
multiply the atomic mass (grams) by the number of moles correct answers
How do you
convert from moles to
grams?
Divide the total number of grams by the atomic mass (grams) of 1
mole correct
answers How do you convert from grams to
moles?
,Mass correct answers measure of the amount of
matter
Compound correct answers made from atoms of 2+ elements that are
chemically
bonded; cannot be separated into simpler substances by any physical
process; can
separated by bea chemical
reaction
Solid correct answers Definite shape and
volume
Doesn't conform to shape of
container
Particles are very close together in orderly fashion with little freedom
of motion
Liquid correct answers Definite volume,
indefinite shape
Conforms to shape of the part of the
containerare
Particles it fills
close together but not rigidly in position with freedom to
move past each
othe
r
Gas correct answers No definite shape or
volume
Conforms to shape and volume of
container
Particles separated by distances very large compared to size of
particles
Physical Property correct answers Color, melting point,
boiling point
Observed and measured without changing identity of
substance
Chemical Property correct answers Observed by performing a
chemical change
Mixture correct answers Combination of 2+ elements, each retains its
identity and
properti
es
Can be separated by physical means into pure components without changing
identity
compoun of
ds
Pure Substance correct answers fixed composition and differs from a
mixture has
sample (every
same properties and
composition)
Polyatomic Ion correct answers molecule with a
charge
contain more than 1 atom chemically bonded
together
ions correct answers atoms with charge formed by loss or gain of
an electron
Cation correct answers positive ion, may have roman
numeral
Anion correct answers negative ion, element ends
in -ide
isotope correct answers atom of an element that has a different mass
because of
different a
number of neutrons, but same atomic
number
Atomic Number correct answers total number of protons in an atom;
also indicates
number of
electrons
, Catalyst correct answers additional reactant that increases the rate of a
reaction
lower with a
activation
energy
Surface
area
Concentrati
on
Temperatur
e
Catalyst correct answers What 4 factors impact the rate of a
reaction?
exothermic reaction correct answers A reaction that RELEASES energy in
the form of
hea
t
endothermic reaction correct answers A reaction that ABSORBS energy in
the form of
hea
t
6.022 x 10^23 particles correct answers How many
particles/atoms/molecules
mole are in a
?
Amount of area exposed for the reaction of a solid correct answers
Surface area
impacts rate of reaction
how?
increase the # of reactants in the container, more collisions occur
w/enough
proper energy &correct answers Concentration impacts rate of
orientation
reaction how?
Higher temperature....more motion....more forceful or higher energy
collisionsTemperature
answers correct impacts rate of reaction
how?
Boyle's Law correct answers pressure increases, volume
decreases
pV = constant or p1V1 =
p2V2
Charles' Law correct answers Volume goes up, then temperature goes up,
pressure
remains the
same
V/T = constant or V1/T1 =
V2/T2
Avogadro's Law correct answers volume increases with number
increases
v/
n
Guy-Lussac's Law correct answers increase in temperature & increase in
pressure
p/T = constant or p1/T1 =
p2/T2
Ideal Gas Law correct answers PV =
nRT
when 3 variables are given in an question correct answers When do you
use the Ideal
gas
law?
- reacting particles must
collide
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