Which pair of molecules has the strongest dipole-dipole ...

[viki]

Which pair of molecules has the strongest dipole-dipole interactions?
 
  A) NH3 and CH4
  B) NH3 and NH3
  C) CH4 and CH4
  D) CO2 and CO2
  E) CO2 and CH4

Question 2

Which process is endothermic?
 
  A) Water condenses on the outside of a cold soda can.
  B) The melted wax hardens after a candle is extinguished.
  C) Water vapor forms ice crystals in the upper atmosphere.
  D) Gasoline spilled on the ground evaporates very quickly.
  E) none of the above

[14vl19]

Answer to Question 1

B

Answer to Question 2

D

[viki]

Thank you!

[14vl19]

Always glad to help...