128. When 3.90 g of a mixture of aluminum and its oxide was treated with a sodium hydroxide solution, 840 ml of gas was released, measured under normal conditions. Determine the percentage composition (by weight) of the initial mixture.

Read the product description. After payment, the system will redirect you to a page with a ready-made solution to problem 128 from the collection: Glinka N.L. Problems and exercises in general chemistry. Textbook for universities / Ed. V.A. Rabinovich and Kh.M. Rubina. – 23rd ed., revised. – L.: Chemistry, 1985. – 264 p., ill. The solution is a document formatted in MS Word.
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