What is the potential energy of an electron and a proton in a hydrogen atom if the distance between them is 5.3 x 10-11 m

Explain which atom l or m is more stable and why

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Is 9 correct? and can someone me with 10? it’s due tomorrow, you