SO₂(g) + NO₂(g) ↔ SO₃(g) + NO (g)
At a given termperature, analysis of an equilibrium mixture found [SO₂] = 4.00 M, [NO₂] = 0.500 M, [SO₃] = 3.00 M, and [NO] = 2.00 M.

(a) What is the new equilibrium concentration of NO when 1.50 moles of NO₂ are added to the equilibrium mixture? Assume a 1.00 L container.
[NO] = _____ M