Assessment: Chemical Equilibrium

At dynamic equilibrium, why do concentrations stay constant?

Does Le Chatelier's principle predict that a disturbed equilibrium returns to its EXACT original state?

For H₂(g) + I₂(g) ⇌ 2HI(g), equilibrium concentrations are [H₂] = 0.050 mol/L, [I₂] = 0.050 mol/L, [HI] = 0.40 mol/L. Find Kc.

A reaction has Kc = 3.2 × 10⁹. What does this indicate?

For 2SO₂(g) + O₂(g) ⇌ 2SO₃(g), predict the effect of INCREASING pressure on the position of equilibrium.

For the equilibrium 2SO₂(g) + O₂(g) ⇌ 2SO₃(g), some SO₃ is removed from the container. Which direction does the equilibrium shift?

Haemoglobin binds oxygen in the lungs (high O₂) and releases it in body tissues (low O₂), via the equilibrium Hb + O₂ ⇌ HbO₂. What principle explains this?

A system at equilibrium has its temperature changed, and a new equilibrium is reached. Does Kc necessarily stay the same?