Объяснение:
SO2, Na2O, N2O3, CaO
Mr(SO2) = 32+16*2 = 64
W(O) = Ar(O) *n / Mr(SO2) *100% = 16*2 / 64 *100% =50%
Объяснение:
SO2, Na2O, N2O3, CaO
Mr(SO2) = 32+16*2 = 64
W(O) = Ar(O) *n / Mr(SO2) *100% = 16*2 / 64 *100% =50%