Объяснение:
Mr(Na2SO4) = 23*2 + 32 + 16*4 = 142
Mr(FeCO3) = 56 + 12 + 16*3 =116
Mr(MgCl2) = 24 + 35,5*2 = 95
Mr(HgS) = 200 + 32 = 232
Mr(K3PO4) = 39*3 + 31 + 16*4 =212
Объяснение:
Mr(Na2SO4) = 23*2 + 32 + 16*4 = 142
Mr(FeCO3) = 56 + 12 + 16*3 =116
Mr(MgCl2) = 24 + 35,5*2 = 95
Mr(HgS) = 200 + 32 = 232
Mr(K3PO4) = 39*3 + 31 + 16*4 =212