CHEM 120 EXAM 2 INTRODUCTION TO
GENERAL ORGANIC AND BIOLOGICAL
CHEMISTRY NEW UPDATE ACTUAL
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
⫸ Molar mass Answer: The relationship between grams and moles.
Units of g/mol. Calculated by adding together the molar mass values of
atoms in a molecule.
⫸ Mole Answer: Exactly 6.022 x 10(23) particles. Just as 12 = one
dozen, 1 mole = 6.022 x 10(23)
⫸ Formula mass Answer: Calculated by adding up the formula masses
of atoms in a compound. Units of AMU (atomic mass units).
⫸ Balanced chemical equations Answer: A chemical equation that has
the same number of each atom on both product and reactant sides.
⫸ Conservation of mass Answer: The law that sates that matter cannot
be created or destroyed in a chemical reaction. Atoms are simply
rearranged to form new molecules.
⫸ Coefficent Answer: Number placed in front of a substance in a
chemical equation to denote quantity. For example, 3H2O means there
, are 3 total H2O molecules. Can only go in front of a substance, not
inside.
⫸ Dilution Answer: The process of making a concentration solution less
concentrated through the addition of solvent. Equation is C1V1 = C2V2.
In a dilution, the volume increase as the solution concentration
decreases.
⫸ Stoichiometry Answer: Using the mole-to-mole ratio from a balanced
chemical reaction to convert between moles of one substance and moles
to another.
⫸ Solution Answer: A homogenous mixture. Can be solid. liquid. or
gas.
⫸ Solvent Answer: The large part of a solution. For example, the water
in salt water.
⫸ Solute Answer: The small part of a solution. For example, the salt in
salt water.
⫸ Concentration Answer: A measure of how much solute is present in
solution. Units can be % mass by volume, molarity, and osmolarity.
⫸ Molarity Answer: The relationship between moles of solute and L of
told solution. M = mol/L
GENERAL ORGANIC AND BIOLOGICAL
CHEMISTRY NEW UPDATE ACTUAL
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
⫸ Molar mass Answer: The relationship between grams and moles.
Units of g/mol. Calculated by adding together the molar mass values of
atoms in a molecule.
⫸ Mole Answer: Exactly 6.022 x 10(23) particles. Just as 12 = one
dozen, 1 mole = 6.022 x 10(23)
⫸ Formula mass Answer: Calculated by adding up the formula masses
of atoms in a compound. Units of AMU (atomic mass units).
⫸ Balanced chemical equations Answer: A chemical equation that has
the same number of each atom on both product and reactant sides.
⫸ Conservation of mass Answer: The law that sates that matter cannot
be created or destroyed in a chemical reaction. Atoms are simply
rearranged to form new molecules.
⫸ Coefficent Answer: Number placed in front of a substance in a
chemical equation to denote quantity. For example, 3H2O means there
, are 3 total H2O molecules. Can only go in front of a substance, not
inside.
⫸ Dilution Answer: The process of making a concentration solution less
concentrated through the addition of solvent. Equation is C1V1 = C2V2.
In a dilution, the volume increase as the solution concentration
decreases.
⫸ Stoichiometry Answer: Using the mole-to-mole ratio from a balanced
chemical reaction to convert between moles of one substance and moles
to another.
⫸ Solution Answer: A homogenous mixture. Can be solid. liquid. or
gas.
⫸ Solvent Answer: The large part of a solution. For example, the water
in salt water.
⫸ Solute Answer: The small part of a solution. For example, the salt in
salt water.
⫸ Concentration Answer: A measure of how much solute is present in
solution. Units can be % mass by volume, molarity, and osmolarity.
⫸ Molarity Answer: The relationship between moles of solute and L of
told solution. M = mol/L
