posted by marilyn .
a)determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4x12H2O
b)determine the maximum gram of Ba(PO4)2 that can be formed from your mass of BaClx2H2O
Just follow the steps in this example. http://www.jiskha.com/science/chemistry/stoichiometry.html