Предмет: Химия, автор: DysiaT

Какой объём водорода, измеренный при нормальных условиях выделится при действии на алюминий массой 32,4 г раствора объёмом 200 мл с массовой долей гидроксида калия 30 %, плотность раствора 1,29 г/мл.

Ответы

Автор ответа: zibuchok

2Al+2KOH+2H2O =2KAlO2+3H2
1)77,4грамм вещества гидроксида калия
32,4*112/54=67,2 гидроксида калия в избытке поэтому будем вести вычисление по алюминию
32,4*67,2/54=40,32литра водорода

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Read the text "Comfort food'.

Katie and Gilda talk about the food they eat to remember home and other comfort food they like.

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Katie: So what are three foods that you absolutely have to have that you can't live without?

Gilda: I would say that I could not live without arepa. It's like my daily breakfast in Venezuela.

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