IOM 2018, Блиц, английски — Задача 54

OLYMPIAD OF METROPOLISES. Moscow, September 3 · 3 септември 2018 г.

Условие

When 3.00 g of mineral M is treated with an excess acid, 0.4313 L of carbon dioxide escape (at 298 K and 1 bar). M contains 55.31% copper (by mass) and consists of four elements. Assume that all copper ions are in oxidation state +2. How many moles of oxygen are in one mole of M? Take $A_r(Cu) = 63.5$.

Отговори

Решение

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Оригинал в Архива: blitz.pdf · официални решения: blitz-answers.pdf