AP Chemistry Exam! HELP!?

Question

13. A 22.4 L container of an ideal gas has a pressure of 1.0 atm. and a temperature of 273 degrees Kelvin. It contains Nitrogen, Oxygen and Carbon Dioxide. The partial pressure of the Oxygen is twice the partial pressure of the Carbon Dioxide. The partial pressure of the Nitrogen is twice that of the Oxygen. What is the partial pressure of the Carbon Dioxide?

a. 0.143 atm. (1/7 atm.)

b. 0.286 atm

c. 0.571 atm

d. 0.22 atm

15. Which of the following forces is present between all molecules even if it's not the only or the strongest intermolecular force?

a. London Dispersion Forces (LDFs)

b. Hydrogen Bonding

c. Dipole to Dipole Forces

d. None are present in all molecules

16. Which of the following should have the lowest boiling point?

a. NH3

b. N2

c. HF

d. H2O

e. Na2S

17. Which of the following has dipole-dipole as it's major attractive force.

a. Na2S

b. HF

c. N2

d. H2O

e. None of these

Answer 1

A

C

B

D

I see that they have not changed the test in 6 years.