HONORS CHEMISTRY PRACTICE TEST FINAL 1
ACTUAL SCRIPT 2026 COMPLETE QUESTIONS
AND CORRECT ANSWERS GRADED A+
◉ Avogadro's Number.
Answer: 6.022 x 10^23
◉ how to find molar mass of a compound.
Answer: add up the average atomic masses of each atom (pay
attention to subscripts)
◉ percent composition formula.
Answer: (mass of element/mass of compound) x 100
◉ empirical formula.
Answer: a formula with the lowest whole-number ratio of elements
in a compound
◉ how to get to the empirical formula.
Answer: percent composition (100g sample) mass composition
(molar mass) mole composition (divide by smallest number) mole
ratio (multiply to make a whole number) empirical formula
,◉ how to find the molecular formula.
Answer: divide the given molecular mass by the molecular mass of
the empirical formula
◉ stoichiometry.
Answer: mass A to moles A using the molar mass; moles A to moles
B using the mole ratio; moles B to mass B using the molar mass
◉ limiting reactants.
Answer: the substance which limits the extent of the reaction and
therefore determines the amount of product formed (what you run
out of first in a reaction)
◉ excess reactants.
Answer: reactants left over after a reaction has gone to completion
◉ how to determine the limiting reactant.
Answer: find the moles (or grams) of product that each could
produce (you must find the same product); whichever one produces
fewer moles (or grams) of product is the limiting reactant
◉ how to find the amount of excess reactant remaining.
, Answer: find the amount of excess reactant used by the limiting
reactant; subtract that amount from the original amount of the
excess reactant
◉ theoretical yield.
Answer: the maximum amount of product which can be produced
from a given amount of reactant (calculated from the balanced
equation using stoichiometry)
◉ actual yield.
Answer: the amount of product actually produced when an
experiment is performed (determined experimentally; given in a
problem)
◉ percent yield formula.
Answer: (actual/theoretical) x 100
◉ energy.
Answer: the capacity to do work or produce heat
◉ first law of thermodynamics.
Answer: energy can be transferred from one form to another but not
created or destroyed (the energy of the universe is constant)
ACTUAL SCRIPT 2026 COMPLETE QUESTIONS
AND CORRECT ANSWERS GRADED A+
◉ Avogadro's Number.
Answer: 6.022 x 10^23
◉ how to find molar mass of a compound.
Answer: add up the average atomic masses of each atom (pay
attention to subscripts)
◉ percent composition formula.
Answer: (mass of element/mass of compound) x 100
◉ empirical formula.
Answer: a formula with the lowest whole-number ratio of elements
in a compound
◉ how to get to the empirical formula.
Answer: percent composition (100g sample) mass composition
(molar mass) mole composition (divide by smallest number) mole
ratio (multiply to make a whole number) empirical formula
,◉ how to find the molecular formula.
Answer: divide the given molecular mass by the molecular mass of
the empirical formula
◉ stoichiometry.
Answer: mass A to moles A using the molar mass; moles A to moles
B using the mole ratio; moles B to mass B using the molar mass
◉ limiting reactants.
Answer: the substance which limits the extent of the reaction and
therefore determines the amount of product formed (what you run
out of first in a reaction)
◉ excess reactants.
Answer: reactants left over after a reaction has gone to completion
◉ how to determine the limiting reactant.
Answer: find the moles (or grams) of product that each could
produce (you must find the same product); whichever one produces
fewer moles (or grams) of product is the limiting reactant
◉ how to find the amount of excess reactant remaining.
, Answer: find the amount of excess reactant used by the limiting
reactant; subtract that amount from the original amount of the
excess reactant
◉ theoretical yield.
Answer: the maximum amount of product which can be produced
from a given amount of reactant (calculated from the balanced
equation using stoichiometry)
◉ actual yield.
Answer: the amount of product actually produced when an
experiment is performed (determined experimentally; given in a
problem)
◉ percent yield formula.
Answer: (actual/theoretical) x 100
◉ energy.
Answer: the capacity to do work or produce heat
◉ first law of thermodynamics.
Answer: energy can be transferred from one form to another but not
created or destroyed (the energy of the universe is constant)
