How can a precipitation reaction be used as a qualitative test for a specific ion in solution?

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

Once similarity and one difference between a mixture of elements and a mixture of compounds