**1.** The following reaction has reached equilibrium at temperature T.

At equilibrium, the concentrations of A and B are 2 mol.dm

^{-3} each, and the volume of the container is 2dm

^{3}. At T, the Kc was found to be 4,5. Determine the original mols of A and B used.

**2.** The reaction given below has reached equilibrium at a temperature T.

This reaction was performed in a sealed 1 dm

^{3} container, starting with just 1 mol of N

_{2}O

_{4}. The K

_{c} was determined to be 4 at temperature T.

Calculate the mols of N

_{2}O

_{4} and NO

_{2} at equilibrium.

**2.**
A good starting point would be to let the mols of N_{2}O_{4} that react = x
accepted value of x = 0,62 mols

-1,62 NA since negative mols not possible

**Equilibrium mols of N**_{2}O_{4}:
= 1 - x

= 1 - 0,62

= 0,38 mols (34, 96g)

**Equilibrium mols of NO**_{2}:
= 2x

= 2(0,62)

= 1,24 mols (57,04g)