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CHEMISTRY FINAL ACS EXAM 2026-WELL
REVISED ASSESSMENT WITH ACTUAL
QUESTIONS AND VERIFIED ANSWERS
Empirical Formula vs Molecular Formula? - correct-answer -Molecular = the
actual number of atoms in a compound
Empirical = basic ratio, smallest whole numbers of atoms in a compound
Percent Composition? - correct-answer -Mass element/mass compound x 100
Limiting Reactant? - correct-answer -The reactant which runs out first...meaning it
limits how much product can be made
ex: If there's 1 mole of NaOH and 2 moles of HCl, NaOH is the limiting reactant,
because it is used up (only 1 mole)
Which state of matter has the greatest Kinetic Energy? - correct-answer -Gas has
the greatest KE, because the particles are far apart and moving fast
What are the three types of Intermolecular Forces? - correct-answer -(1)
Hydorgen Bonding
(2) Dipole Attraction
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(3) Dispersion Forces
What do you call a solid changing to a gas? - correct-answer -Sublimation
What are the values for STP? - correct-answer -0 Celcius or 273 Kelvin
1 atm = 101.3 kPa = 760 mmHg
Why is the pressure of a gas directly proportional to the number of particles? -
correct-answer -P1/N1 = P2/N2....because pressure is caused by collisions of gas,
and more particles means more collisions
Why is the volume of a gas inversely proportional to pressure? - correct-answer -
P1 x V1 = P2 x V2...because as volume increases, there is less opportunity for
particles to collide
Why is the pressure of a gas directly proportional to temperature? - correct-
answer -P1/T1 = P2/T2....because as temperature increases, KE increases, which
makes collisions happen more often and harder
CHEMISTRY FINAL ACS EXAM 2026-WELL
REVISED ASSESSMENT WITH ACTUAL
QUESTIONS AND VERIFIED ANSWERS
Empirical Formula vs Molecular Formula? - correct-answer -Molecular = the
actual number of atoms in a compound
Empirical = basic ratio, smallest whole numbers of atoms in a compound
Percent Composition? - correct-answer -Mass element/mass compound x 100
Limiting Reactant? - correct-answer -The reactant which runs out first...meaning it
limits how much product can be made
ex: If there's 1 mole of NaOH and 2 moles of HCl, NaOH is the limiting reactant,
because it is used up (only 1 mole)
Which state of matter has the greatest Kinetic Energy? - correct-answer -Gas has
the greatest KE, because the particles are far apart and moving fast
What are the three types of Intermolecular Forces? - correct-answer -(1)
Hydorgen Bonding
(2) Dipole Attraction
, 2|Page
(3) Dispersion Forces
What do you call a solid changing to a gas? - correct-answer -Sublimation
What are the values for STP? - correct-answer -0 Celcius or 273 Kelvin
1 atm = 101.3 kPa = 760 mmHg
Why is the pressure of a gas directly proportional to the number of particles? -
correct-answer -P1/N1 = P2/N2....because pressure is caused by collisions of gas,
and more particles means more collisions
Why is the volume of a gas inversely proportional to pressure? - correct-answer -
P1 x V1 = P2 x V2...because as volume increases, there is less opportunity for
particles to collide
Why is the pressure of a gas directly proportional to temperature? - correct-
answer -P1/T1 = P2/T2....because as temperature increases, KE increases, which
makes collisions happen more often and harder
