Объяснение:
Mr(KMnO4)=39+55+16*4=158
W(K)=Ar(K)*n/Mr(KMnO4) *100%=39*1/158. *100%=25%
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Объяснение:
Mr(KMnO4)=39+55+16*4=158
W(K)=Ar(K)*n/Mr(KMnO4) *100%=39*1/158. *100%=25%