AP Chemistry Exam part 3! Have fun!?

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

14. True or False: An alloy is a mixture with metallic properties. (As opposed to a pure substance.)

a. True

b. False

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

Answer 1

1) a, 7 parts of gas

14) a, It's a mixture of different metals, for example brass

15) a, Even non polar molecules show temporarily an unsymmetrical distribution of charge that induces charges in nearby molecules.  

16) b, This is a totally non polar gas.