Straighterline CHEM101 Final
Mass Number - correct answer total number of neutrons and protons in an atom;
# protons + # electrons
p - correct answer Most nonmetallic elements are found in which block of the
periodic table?
Positive matter is concentrated in the central core - correct answer Ernest
Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing
that...
Potassium - correct answer Plants use up copious amounts of which alkali metal,
preventing most of it from being washed out to sea?
2:1:1:2 - correct answer 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 answer What is Avogadro's number?
Mg - correct answer What is the reducing agent in the following equation?
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)
(s) < (l) < (g) - correct answer Which arrangement accurately describes the
standard entropy values at different phases?
2, 8, 20, 50, 82 or 126 protons - correct answer What are the most stable
isotopes?
S = oxidized
N = reduced - correct answer What element has been oxidized and what element
has been reduced?
3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O
,Straighterline CHEM101 Final
multiply the atomic mass (grams) by the number of moles - correct answer How
do you convert from moles to grams?
Divide the total number of grams by the atomic mass (grams) of 1 mole - correct
answer How do you convert from grams to moles?
Mass - correct answer measure of the amount of matter
Compound - correct answer 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 answer 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 answer 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 answer 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 answer Color, melting point, boiling point
Observed and measured without changing identity of substance
Chemical Property - correct answer Observed by performing a chemical change
Mixture - correct answer 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 answer fixed composition and differs from a mixture
(every sample has same properties and composition)
, Straighterline CHEM101 Final
Polyatomic Ion - correct answer molecule with a charge
contain more than 1 atom chemically bonded together
ions - correct answer atoms with charge formed by loss or gain of an electron
Cation - correct answer positive ion, may have roman numeral
Anion - correct answer negative ion, element ends in -ide
isotope - correct answer atom of an element that has a different mass because of
a different number of neutrons, but same atomic number
Atomic Number - correct answer total number of protons in an atom; also
indicates number of electrons
Catalyst - correct answer additional reactant that increases the rate of a reaction
with a lower activation energy
Surface area
Concentration
Temperature
Catalyst - correct answer What 4 factors impact the rate of a reaction?
exothermic reaction - correct answer A reaction that RELEASES energy in the
form of heat
endothermic reaction - correct answer A reaction that ABSORBS energy in the
form of heat
6.022 x 10^23 particles - correct answer How many particles/atoms/molecules
are in a mole?
Amount of area exposed for the reaction of a solid - correct answer Surface area
impacts rate of reaction how?
increase the # of reactants in the container, more collisions occur w/enough
energy & proper orientation - correct answer Concentration impacts rate of
reaction how?
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