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Straighterline CHEM101 Final With Complete Solution 100% Verified.

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Straighterline CHEM101 Final With Complete Solution 100% Verified.

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  • June 23, 2024
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Straighterline CHEM101 Final With Complete
Solution 100% Verified




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

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

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

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