29Ans 1..50% ..diamond forms a structure similar to ZnS..
Ans2..The funda that is to be used here is that there is some amount of water in CuSO4.5H2O ..which when dissolved in solution will leave the molecule..so now the wt of the molecule becomes 16g and the rest 9g was water ..so now we need to prepare 200g solution..for that we need 175g of water..