Ответ:
Объяснение:
Мr(NaOH) = Ar(Na) + Ar(O) + Ar(H) = 23 + 16 + 1 = 40
w(О)= Ar(О) * n /Мr(NaOH) * 100% = 16/40 * 100% = 40%
Мr(Ca(OH)2) = Ar(Ca) + Ar(O) * 2 + Ar(H) * 2 = 40 + (16 + 1) * 2 = 74
w(О)= Ar(О) * n /Мr(Ca(OH)2) * 100% = 16 * 2/74 * 100% = 43,24%
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Ответ:
Объяснение:
Мr(NaOH) = Ar(Na) + Ar(O) + Ar(H) = 23 + 16 + 1 = 40
w(О)= Ar(О) * n /Мr(NaOH) * 100% = 16/40 * 100% = 40%
Мr(Ca(OH)2) = Ar(Ca) + Ar(O) * 2 + Ar(H) * 2 = 40 + (16 + 1) * 2 = 74
w(О)= Ar(О) * n /Мr(Ca(OH)2) * 100% = 16 * 2/74 * 100% = 43,24%