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+//ques-16.10
+//Calculating rate constant and half life and time required to complete 75 percent of reaction
+clc
+a=0.1;//initial concentration (in mol/L)
+x1=(20/100)*a;//mol/L
+t1=40;//time (in minutes)
+//2nd order reaction
+k=x1/(a*t1*(a-x1));//rate constant (in L/mol/min)
+t_h=1/(a*k);//half-life (in min)
+x2=(75/100)*a;//mol/L
+t2=x2/(a*k*(a-x2));//time required (in min)
+printf("The rate constant is %.4f L/mol/min, half-life is %.0f min and time required to complete 75 percent of reaction is %d min.",k,t_h,t2);