AP Chemistry

Question 1

What is the molar mass of water (H2O)?

Accepted Answer

18.02 g/mol

Question 2

According to the ideal gas law, what is the value of R in L*atm/(mol*K)?

Accepted Answer

0.0821

Question 3

What type of bond forms between two nonmetal atoms sharing electrons?

Accepted Answer

Covalent bond

Question 4

In an exothermic reaction, the enthalpy change (delta H) is:

Accepted Answer

Negative

Question 5

What is the pH of a solution with [H+] = 1 x 10^-4 M?

Accepted Answer

4

Question 6

Which law states that the total pressure of a gas mixture equals the sum of partial pressures?

Accepted Answer

Dalton's Law of Partial Pressures

Question 7

What is the oxidation state of sulfur in H2SO4?

Accepted Answer

+6

Question 8

How many moles of NaCl are in 58.44 grams of NaCl?

Accepted Answer

1 mole

Question 9

What is the electron configuration of carbon (Z=6)?

Accepted Answer

1s2 2s2 2p2

Question 10

At standard temperature and pressure (STP), one mole of an ideal gas occupies:

Accepted Answer

22.4 L

Question 11

What does Le Chatelier's principle predict when concentration of a reactant is increased?

Accepted Answer

Equilibrium shifts toward products

Question 12

Which element has the highest electronegativity?

Accepted Answer

Fluorine

Question 13

What is the molarity of a solution with 2 moles of solute in 500 mL of solution?

Accepted Answer

4 M

Question 14

In a voltaic (galvanic) cell, oxidation occurs at which electrode?

Accepted Answer

The anode

Question 15

What is the hybridization of the central atom in methane (CH4)?

Accepted Answer

sp3

Question 16

Which quantum number describes the shape of an orbital?

Accepted Answer

Azimuthal quantum number (l)

Question 17

What happens to the rate of reaction when a catalyst is added?

Accepted Answer

The rate increases by lowering activation energy

Question 18

What is the conjugate base of H2O?

Accepted Answer

OH-

Question 19

According to the first law of thermodynamics, delta E =

Accepted Answer

q + w (heat plus work)

Question 20

How many sigma bonds and pi bonds are in a triple bond?

Accepted Answer

1 sigma and 2 pi

Question 21

What is the shape of a molecule with 4 bonding pairs and 0 lone pairs around the central atom?

Accepted Answer

Tetrahedral

Question 22

In a first-order reaction, the half-life is:

Accepted Answer

Independent of initial concentration (t1/2 = 0.693/k)

Question 23

What is the net ionic equation for mixing NaCl(aq) and AgNO3(aq)?

Accepted Answer

Ag+(aq) + Cl-(aq) -> AgCl(s)

Question 24

Which intermolecular force is the strongest?

Accepted Answer

Hydrogen bonding

Question 25

What is Avogadro's number?

Accepted Answer

6.022 x 10^23

AP Chemistry

Question Preview

Preview Complete!