32,7 g XO va YO₂ oksidlar aralashmasi vodorod bilan qaytarilganda YO₂ erkin metallgacha qaytariladi, XO esa o‘zgarmaydi. Hosil bo‘lgan qattiq qoldiq 26,3 g. Ushbu qoldiq HCl da eritilganda hosil bo‘lgan xloridlar massasi m(XCl₂)+m(YCl₂) = 46 g bo‘ldi. Agar Ar(X) − Ar(Y) = 82 bo‘lsa, YO₂ oksidining molyar massasini (g/mol) aniqlang.

  1. 80
  2. 239
  3. 87
  4. 151

📝 Detailed explanation

YO₂ dan ajralgan kislorod: 32,7 − 26,3 = 6,4 g ⇒ n(O)=0,4 mol ⇒ n(YO₂)=0,2 mol. Xloridlanishda har metalldan 2 mol Cl⁻ qo‘shiladi. Aralashmadagi XO miqdorini hisoblab, Ar(X)−Ar(Y)=82 sharti bilan tenglamalarni yechganda Ar(Y)=55 (Mn) chiqadi ⇒ M(YO₂)=55+32=87 g/mol (MnO₂).
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