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+//ques-15.4
+//Calculating equilibrium concentration of hydrogen and iodine and hydrogen iodide
+clc
+m1=12;//mass of hydrogen (in g)
+m2=762;//mass of iodine (in g)
+Kc=64;//equilibrium constant
+a=m1/2;//moles of H2
+b=m2/254;//moles of I2
+//Kc=(4*x^2)/((a-x)*(b-x))
+//Solving, 60*x^2-576*x+1152 = 0
+D=576^2-4*60*1152;
+x=(576-sqrt(D))/(2*60);
+printf("Equilibrium concentrations of hydrogen, iodine and hydrogen iodide are %.2f, %.2f and %.0f g respectively.",(a-x)*2,(b-x)*254,(2*x)*128);