Mr(H4P2O7) = 1*4+31+2+16*7 = 178
Mr( Fe2(SO4)3) = 56*2+(32+16*4)*3 = 400
Mr(Al2(SO3)3) = 27*2+(32+16*3)*3 = 294
Объяснение:
Mr(H4P2O7) = 1*4+31+2+16*7 = 178
Mr( Fe2(SO4)3) = 56*2+(32+16*4)*3 = 400
Mr(Al2(SO3)3) = 27*2+(32+16*3)*3 = 294
Объяснение: