Ответ:
Ar(K) = 39
Ar(Mn) = 55
Ar(O) = 16
Mr(KMnO₄) = Ar(K) + Ar(Mn) + 4Ar(O) = 39+55+4*16 = 158
w(Э) = n*Ar(Э)/Mr
w(K) = 39/158 = 0,2468 или 24,68%
w(Mn) = 55/158 = 0,3481 или 34,81%
w(O) = 4*16/158 = 0.4051 или 40,51%
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Ответ:
Ar(K) = 39
Ar(Mn) = 55
Ar(O) = 16
Mr(KMnO₄) = Ar(K) + Ar(Mn) + 4Ar(O) = 39+55+4*16 = 158
w(Э) = n*Ar(Э)/Mr
w(K) = 39/158 = 0,2468 или 24,68%
w(Mn) = 55/158 = 0,3481 или 34,81%
w(O) = 4*16/158 = 0.4051 или 40,51%