In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage composition of chlorine in the compound is ___________%. [Given: Molar mass in g mol of Ag = 108, Cl = 35.5]
S = (-1,1) is the focus, is the directrix corresponding to S and is the eccentricity of an ellipse. If is the centre of the ellipse, then is: