If a reaction system has come to equilibrium, the concentration of products can be increased
a.
only if it is not reversible.
c.
by applying le châtelier’s principle.
b.
only if the temperature is low enough.
d.
under no circumstances.

If a reaction system has come to equilibrium, the concentration of products can be increased by applying Le Châtelier’s principle. The answer is letter C. The statements "only if it is not reversible",  "only if the temperature is low enough" and "under no circumstances" do not answer the question above.

30litre of li2o is 1.0002mole approximately 1 mole