Dinitrogen tetroxide partially decomposes according to the ...

[mia]

Dinitrogen tetroxide partially decomposes according to the following equilibrium: N2O4 (g)  2NO2 (g)
 
  A 1.000-L flask is charged with 9.20  10-3 mol of N2O4. At equilibrium, 5.98  10-3 mol of N2O4 remains. Keq for this reaction is ________.
  A) 0.183
  B) 0.197
  C) 0.212
  D) 6.94  10-3
  E) 2.96  10-5

Question 2

Silicones are ________.
 
  A) chains of alternating silicon and oxygen atoms with attached organic groups
  B) three-dimensional covalent networks of SiO4 tetrahedra
  C) three-dimensional covalent networks of silicon atoms
  D) flat sheets of silicon atoms
  E) flat sheets of silicon and hydrogen atoms

[ergserg]

Answer to Question 1

D

Answer to Question 2

A

[mia]

Gracias!

[Joy Chen]

TYSM