A sample of oxygen gas that contains one-half of Avogadro's ...

[meagbuch]

A sample of oxygen gas that contains one-half of Avogadro's number of molecules has a mass of ________.
 
  A) 8.0 g
  B) 16.0 g
  C) 32.0 g
  D) 64.0 g

Question 2

Equal numbers of moles for A and B are added to the reaction vessel and equilibrium established. At that point ________.
 
  A + 3B = 2C
  A) A < B
  B) A > B
  C) A = B
  D) One cannot say unless the equilibrium constant value is known.

Question 3

________ was the first person to propose a consistent modern atomic theory.
 
  A) Dalton
  B) Democritus
  C) Proust
  D) Lavoisier

[bigcheese9]

Answer to Question 1

B

Answer to Question 2

B

Answer to Question 3

A

[meagbuch]

YES! Correct, THANKS for helping me on my review

[ricroger]

Wow, this really help