Straighterline CHEM101 Final 300+ questions with 100% verified answers
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Course
CHEM101
Institution
CHEM101
Straighterline CHEM101 Final 300+ questions with 100% verified answers/Straighterline CHEM101 Final 300+ questions with 100% verified answers/Straighterline CHEM101 Final 300+ questions with 100% verified answers
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
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
,Straighterline CHEM101 Final
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)
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
, Straighterline CHEM101 Final
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?
Higher temperature....more motion....more forceful or higher energy collisions - correct answer
Temperature impacts rate of reaction how?
Boyle's Law - correct answer pressure increases, volume decreases
pV = constant or p1V1 = p2V2
Charles' Law - correct answer Volume goes up, then temperature goes up, pressure remains
the same
V/T = constant or V1/T1 = V2/T2
Avogadro's Law - correct answer volume increases with number increases
v/n
Guy-Lussac's Law - correct answer increase in temperature & increase in pressure
p/T = constant or p1/T1 = p2/T2
Ideal Gas Law - correct answer PV = nRT
when 3 variables are given in an question - correct answer When do you use the Ideal gas law?
- reacting particles must collide
- collisions have proper orientation
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