Odpowiedzi

2010-03-07T18:55:36+01:00
HNO3 = 1 + 14 + 48 = 63
H2SO4 = 2 + 32 + 64 = 98
Al (OH) 3 = 27 + 48 + 3 = 78
Cu2O = 128 + 16 = 144
PbO2 = 207 + 32 = 239