Объяснение:
Mr(Mn2O7) = 55*2 + 16*7 =222
W(Mn) = Ar(Mn) *n / Mr(Mn2O7) *100% = 55*2 / 222 *100% =50%
W(O) = Ar(O) *n / Mr(Mn2O7) *100% = 16*7 / 222 *100% = 50%
Объяснение:
Mr(Mn2O7) = 55*2 + 16*7 =222
W(Mn) = Ar(Mn) *n / Mr(Mn2O7) *100% = 55*2 / 222 *100% =50%
W(O) = Ar(O) *n / Mr(Mn2O7) *100% = 16*7 / 222 *100% = 50%