Jawabanmu

2014-05-19T08:20:19+07:00
Mr Cu(NO3)2= 139,5 Mr H2O=18
100-% H2O=100-36,54= 63,46
% Cu..../ Mr Cu....=% H2O/Mr H2O
63,46/139,5=36,54/18
0,5/2= 1:4
Cu(NO3)2.nH2O= Cu(NO3)2.4H2O
6 2 6