IOM 2021, Блиц — Задача 50

The Blitz-contest of IOM-2021

Условие

The organic substance X is a sulfur analogue of the oxygen-containing compound Y. 5.50 g of X is burned in an excess of oxygen. As a result, 16.63 dm$^3$ of a gas mixture forms (400 K, 1 bar). When the mixture is cooled down to 20°C, a colorless, odorless liquid with the mass of 2.70 g condenses from this mixture. If the remaining gases are passed through a column with calcium hydroxide, a precipitate weighing 36.0 g forms. On air, the precipitate increases in weight by 0.80 g. Determine the formulas of X and Y. Write down the relative molecular mass of Y (as an integer number). Use the integer values of all atomic masses.

Отговори

Решение

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Оригинал в Архива: iom-2021-blitz-tasks-eng.pdf · официални решения: iom-2021-blitz-answers-eng.pdf