Consider the following reaction conducted at a constant temperature: C(g) = 2 D(g)

At equilibrium, it is found that Pc = 0.524 atm and PD = 0.385 atm. Then the volume
of the container is suddenly increased to four times the original volume. Calculate the
total pressure after the system returns to equilibrium.

Iknow #2 is d. i just need to know why

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2