Объяснение:
Mr(H2S) = 1*2+32 = 34
Mr(SO3) = 32+16*3 = 80
Mr(Cu(OH)2) = 64+16*2+1*2 = 98
Mr(P2O5) = 31*2+16*5 = 142
Mr(AlCl3) = 27+35,5*3 = 133,5
Mr(Вa(NO3)2) = 137*1+14*2+16*3*2 = 261
Объяснение:
Mr(H2S) = 1*2+32 = 34
Mr(SO3) = 32+16*3 = 80
Mr(Cu(OH)2) = 64+16*2+1*2 = 98
Mr(P2O5) = 31*2+16*5 = 142
Mr(AlCl3) = 27+35,5*3 = 133,5
Mr(Вa(NO3)2) = 137*1+14*2+16*3*2 = 261