if ka1 0059 ka2 65times10-5 and kw

Question

 if Ka1 = 0.059, Ka2 = 6.5×10^-5 and Kw = 1×10^-14 then compute the molarity of (C₂O₄)2- in 0.13 M oxalic acid  and express your answer in units of mol/L

Determine how many moles of SO₃ are formed if 12.24 moles of O₂ react with excess SO₂,? use the balance equation given as  2SO₂(g)+O₂(g)----> 2SO₃(g)