Предмет: Химия, автор: lizakaktuso

Запишите уравнения реакций, отвечающие следующей цепочке превращений А). алюминий→ хлорид алюминия →гидроксид алюминия → оксид алюминия Б).углерод→ оксид углерода (IV) →угольная кислота → карбонат натрия

Ответы

Автор ответа: plakhutina93

2al+3cl2--2alcl3 Alcl3+3naoh-al(oh)3+3nacl 2Al(oh)3--al2o3+3h2o

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Task. Read the text carefully. Three sentences are missing in the text. Choose from the sentences A-D the one which fits each gap 1-3. There is one extra sentence that you do not need.

Monarch without a kingdom

This November a hundred million butterflies will drop from the sky over Mexico, like autumn leaves. But for how long? Genetically modified maize could mean extinction for this beautiful butterfly. Rafael Ruiz reports.
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Find words in the text which have a similar meaning to these definitions.

Example: An organism containing genetic material that has been artificially altered genetically modified. when a particular kind of animal
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the noise wings make as they move (paragraph II)
what a scientist does in order to find something out (paragraph IV)

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