AP Chemistry Practice Test

The average rate of disappearance of ozone in the reaction 2O₃(g) → 3O₂(g) is found to be 7.25x10^-3 atm over a certain interanl of time. What is the rate of appearance of O₂ during this interval?

• 10.9x10^-3 atm/s

• 7.25x10^-3 atm/s

• 4.83x10^-3 atm/s

• 191x10^-3 atm/s

• 17.5x10^-3 atm/s

Tags

NGSS.HS-PS1-5

Consider the reaction: 4NH₃ + 7O₂ → 4NO₂ + 6H₂O

At a certain instant the initial rate of disappearance of the oxygen gas is X. What is the value of the appearance of water at the same instant?

• 1.2 X

• 1.1 X

• 0.86 X

• 0.58 X

• cannot be determined from the data

Tags

NGSS.HS-PS1-7

Consider the reaction X → Y +Z

Which of the following is a possible rate law?

• Rate = k[X]

• Rate = k[Y]

• Rate = k[Y][Z]

• Rate = k[X][Y]

• Rate = k[Z]

Tags

NGSS.HS-PS1-5

Consider the following rate law: Rate = k[A]ⁿ[B]^m

How are the exponents n and m determined?

• by using the balanced chemical equation

• by using the subscripts for the chemical formulas

• by using the coefficients of the chemical formulas

• by educated guess

• by experiment

The following data were obtained for the reaction of NO with O₂. Concentrations are in molecules/cm³ and rates are in molecules/cm³⋅s.

• Rate = k[NO][O₂]

• Rate = k[NO][O₂]²

• Rate = k[NO]²[O₂]

• Rate = k[NO]²

• Rate = k[NO]²[O₂]²

The reaction of (CH₃)₃CBr with hydroxide ion proceeds with the formation of (CH₃)₃COH.

What will the initial rate (in mol/L⋅s) be in experiment 4?

• 3.0x10^-3

• 6.0x10^-3

• 9.0x10^-3

• 18x10^-3

• none of these

The table shows the initial rate data for a certain reaction. What is the value of k?

• 10⁷ M^-5 s^-1

• 10³ M^-3 s^-1

• 10 M^-2 s^-1

• 50 M^-2 s^-1

• none of these

What is the order of the reaction with respect to B?

• 0

• 1

• 2

• 3

• 4

What is the order of the reaction with respect to A?

• 0

• 1

• 2

• 3

• 4

What is the overall order of the reaction?

• 0

• 1

• 2

• 3

• 4