Calculate the reaction quotient for the reaction below where the concentrations are [SO₃] = 0.500 M, [SO₂] = 0.0500 M, and [O₂] = 0.100 M.
2 SO₃ (g) ⇆ 2 SO₂ (g) + O₂ (g)

For the reaction:N₂ (g) + 2 O₂ (g) ⇌ 2 NO₂ (g), K_c = 8.3 x 10 ^-10 at 25^°C. What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

At a given temperature the gas phase reaction:N₂ (g) + O₂ (g) ⇌ 2 NO (g) has an equilibrium constant of 4.00 x 10 ^-15. What will be the concentration of NO at equilibrium if 2.00 moles of nitrogen and 6.00 moles oxygen are allowed to come to equilibrium in a 2.0 L flask.

2 NO (g) + O₂ (g) ⇆ 2 NO₂ (g)

what is K_c for the reaction shown below?

4 NO₂ (g) ⇆ 4 NO (g) + 2 O₂ (g)

N₂ (g) + O₂ (g) ⇆ 2 NO (g)

2 SO₃ (g) ⇆ 2 SO₂ (g) + O₂ (g)