Ответ:
28.6% > 17%
Объяснение:
1) Mr(KOH) = 1*Ar(K) + 1*Ar(O) + 1*Ar(H)=39+16+1=56w(O)=1*Ar(O)/Mr(KOH) = 16/56*100%= 28.6%2) Mr(K2O)= 2*Ar(K) + 1 *Ar(O)= 2*39+16 = 94w(O) = 1*Ar(O)/Mr(K2O)= 16/94*100%= 17%
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Ответ:
28.6% > 17%
Объяснение:
1) Mr(KOH) = 1*Ar(K) + 1*Ar(O) + 1*Ar(H)=39+16+1=56
w(O)=1*Ar(O)/Mr(KOH) = 16/56*100%= 28.6%
2) Mr(K2O)= 2*Ar(K) + 1 *Ar(O)= 2*39+16 = 94
w(O) = 1*Ar(O)/Mr(K2O)= 16/94*100%= 17%