07243432. Solving a chemistry problem

34. What reactions are called second order reactions? What equation describes them? The reaction constant for the saponification of ethyl acetate with sodium hydroxide is 0.007. Calculate the concentration of ether 15 minutes after the start of the reaction. The initial concentration of the ester is 0.16 mol/l, the saponification reaction of the ester is a second order reaction. Express time in seconds.