1.Oblicz masę cząsteczkową soli: a)CuCO3 b)Ni(NO3)2 c)(NH4)3PO4     2.Olbicz zawartośc procrntową masowy pierwiastków w solach: a)AlCl3 b)Na2SO4 c)Pb(NO3)2   Dzięki

Zad.1 a) m.cz.CuCO3 = 64u + 12u + 3*16u = 124u b) m.cz.Ni(NO3)2 = 59u + 2*14u + 6*16u = 183u c) m.cz.(NH4)3PO4 = 3*14u + 12*1u + 31u + 4*16u = 149u   Zad.2 a) m.cz. = AlCl3 = 27u + 3*35u = 27u + 105u = 132u %Al = (27/132)*100% = 20,45% %Cl = (105/132)*100% = 79,55% b) m.cz.Na2SO4 = 2*23u + 32u + 4*16u = 46u + 32u + 64u = 142u %Na = (46/142)*100% = 32,4% %S = (32/142)*100% = 22,53% %O = (64/142)*100% = 45,07% c) m.cz.Pb(NO3)2 = 207u + 2*14u + 6*16u = 207u + 28u + 96u = 331u %Pb = (207/331)*100% = 62,54% %N = (28/331)*100% = 8,46% %O = (96/331)*100% = 29%

1. CuCO3= 64+12+ 3*16= 124u