[" Calculate the equilibrium constant "(K_(c))" for the reaction below if they are presectar,"],[" equilibrium "5.0" mole of "A_(2),3" mole of "B_(2)" and "2" mole of "AB_(2)" at "8.21" atm and "300K],[qquad A_(2)(g)+2B_(2)(g)rightleftharpoons2AB_(2)(g)+" Heat "],[[" (a) "1.333," (b) "2.66," (c) "20," (d) None of these "]]