Mr(NiSO4) = 59 + 32 + 16*4 = 155
Mr(NaCl) = 23+35 = 58
Mr(Cu(OH)2) = 63,5 + 16*2 = 1*2 = 97,5
Mr(H2S)=1*2 + 32 = 34
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Mr(NiSO4) = 59 + 32 + 16*4 = 155
Mr(NaCl) = 23+35 = 58
Mr(Cu(OH)2) = 63,5 + 16*2 = 1*2 = 97,5
Mr(H2S)=1*2 + 32 = 34