Chem 120 Exam #2 Question and
answers correctly solved 2025
Mole - correct answer ✔the counting unit used for atoms
Molar Mass of an element - correct answer ✔one mole of atoms of any
element is simply the atomic weight in gams listed on the periodic table.
Molar Mass of compounds - correct answer ✔sum of the atomic weight of
each element in grams multiplied by the subscript on the element in the
formula of a compound.
Molar mass of sodium (Na) - correct answer ✔22.99g sodium = 1 mole of
sodium
Molar mass of Aluminum Sulfate Al2(SO4)3 - correct answer ✔Al 27g x 2 =
54g
S 32g x 3 = 96g
O 16g x 12 = 192g
Add them all up to equal = 342g/mol
Law of conservation of mass - correct answer ✔Mass is neither lost nor
gained in a chemical reaction
chemical equilibrium - correct answer ✔a chemical reaction and its reverse
are occurring at equal rates
, Le Chatelier's principle - correct answer ✔if a stress is applied to a system at
equilibrium, the system will adjust to relieve the stress
solutions - correct answer ✔homogeneous mixtures of two or more
substances in which the components are present as atoms, molecules, or
ions.
homogeneous - correct answer ✔matter that has a uniform appearance and
same properties throughout (ex. salt in water) (nonhomogeneous- oil in water)
solvent - correct answer ✔is the substance present in a solution in the
LARGEST amount usually water
Solute - correct answer ✔one or more substances present in the solution in
amounts LESS than the solvent .
Electrolyte - correct answer ✔a solute that when dissolved in water forms a
solution that conducts electricity. (tends to be ionic compounds)
Nonelectrolyte - correct answer ✔a solute that when dissolved in water forms
a solution that does not conduct electricity.
Solubility - correct answer ✔the maximum amount of solute that can be
dissolved in a specific amount of solvent under specific conditions of
temperature and pressure.
soluble substance - correct answer ✔dissolves to a significant extent in a
solvent.
answers correctly solved 2025
Mole - correct answer ✔the counting unit used for atoms
Molar Mass of an element - correct answer ✔one mole of atoms of any
element is simply the atomic weight in gams listed on the periodic table.
Molar Mass of compounds - correct answer ✔sum of the atomic weight of
each element in grams multiplied by the subscript on the element in the
formula of a compound.
Molar mass of sodium (Na) - correct answer ✔22.99g sodium = 1 mole of
sodium
Molar mass of Aluminum Sulfate Al2(SO4)3 - correct answer ✔Al 27g x 2 =
54g
S 32g x 3 = 96g
O 16g x 12 = 192g
Add them all up to equal = 342g/mol
Law of conservation of mass - correct answer ✔Mass is neither lost nor
gained in a chemical reaction
chemical equilibrium - correct answer ✔a chemical reaction and its reverse
are occurring at equal rates
, Le Chatelier's principle - correct answer ✔if a stress is applied to a system at
equilibrium, the system will adjust to relieve the stress
solutions - correct answer ✔homogeneous mixtures of two or more
substances in which the components are present as atoms, molecules, or
ions.
homogeneous - correct answer ✔matter that has a uniform appearance and
same properties throughout (ex. salt in water) (nonhomogeneous- oil in water)
solvent - correct answer ✔is the substance present in a solution in the
LARGEST amount usually water
Solute - correct answer ✔one or more substances present in the solution in
amounts LESS than the solvent .
Electrolyte - correct answer ✔a solute that when dissolved in water forms a
solution that conducts electricity. (tends to be ionic compounds)
Nonelectrolyte - correct answer ✔a solute that when dissolved in water forms
a solution that does not conduct electricity.
Solubility - correct answer ✔the maximum amount of solute that can be
dissolved in a specific amount of solvent under specific conditions of
temperature and pressure.
soluble substance - correct answer ✔dissolves to a significant extent in a
solvent.
