Straighterline CHEM101 Final 314Questions
and Answers Covers 2024/2025 with complete
solution(Graded A+)
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, preventing most of it from being washed out 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?
,Straighterline CHEM101 Final 314Questions
and Answers Covers 2024/2025 with complete
solution(Graded A+)
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 be separated by a 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 container it fills
Particles are close together but not rigidly in position with freedom to move past
each other
Gas - CORRECT ANSWERS No definite shape or volume
Conforms to shape and volume of container
,Straighterline CHEM101 Final 314Questions
and Answers Covers 2024/2025 with complete
solution(Graded A+)
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 properties
Can be separated by physical means into pure components without changing
identity of compounds
Pure Substance - CORRECT ANSWERS fixed composition and differs from a
mixture (every sample has 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 a different number of neutrons, but same atomic number
, Straighterline CHEM101 Final 314Questions
and Answers Covers 2024/2025 with complete
solution(Graded A+)
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 with a lower activation energy
Surface area
Concentration
Temperature
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 heat
endothermic reaction - CORRECT ANSWERS A reaction that ABSORBS energy
in the form of heat
6.022 x 10^23 particles - CORRECT ANSWERS How many
particles/atoms/molecules are in a mole?
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 energy
& proper orientation - CORRECT ANSWERS Concentration impacts rate of
reaction how?
Higher temperature....more motion....more forceful or higher energy collisions -
CORRECT ANSWERS Temperature impacts rate of reaction how?
Boyle's Law - CORRECT ANSWERS pressure increases, volume decreases
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