AP Chemistry Thou Shalt Not Forget

Which of the following is true about gas mixtures?

• Gas mixtures are homogeneous due to the constant random motion of particles.

• Gas mixtures are heterogeneous due to the constant random motion of particles.

• Gas mixtures are homogeneous due to the fixed positions of particles.

• Gas mixtures are heterogeneous due to the fixed positions of particles.

What happens to boiling point as intermolecular forces increase?

• It decreases

• It remains the same

• It increases

• It becomes zero

What is the bond angle for a molecule with 4 domains?

• 90°

• 109.5°

• 120°

• 180°

What is the rhyme to determine the empirical formula?

• Mass to mole, divide by small, times until whole

• Mole to mass, divide by large, times until whole

• Mass to volume, divide by small, times until whole

• Volume to mass, divide by large, times until whole

What is the unit for a first-order rate constant (k)?

What is the oxidation number of hydrogen in a hydride?

• +1

• -1

• 0

• +2

What happens to the percent ionization as the acid concentration decreases?

• It decreases

• It remains the same

• It increases

• It becomes zero

What is the result of a combustion reaction?

• CO and H₂O

• CO₂ and H₂O

• CO₂ and O₂

• CO and O₂

How is the molecular formula of a compound related to its empirical formula?

• It is a fraction of the empirical formula

• It is a whole number multiple of the empirical formula

• It is the same as the empirical formula

• It is unrelated to the empirical formula

According to Le Chatelier's Principle, what happens if $Q > K_{eq}$?

• The reaction shifts to the right, towards the products

• The reaction shifts to the left, towards the reactants

• The reaction remains unchanged

• The reaction stops