Предмет: Химия, автор: dianatisaeva232

СРОЧНО!!! Химия 9 класс.
Какие вещества являются кислотами
А) NH4OH, HCl; Б) NaNO3. Cu(OH)2; В) H2SiO3, HCl; Г) Ca(OH)2, KOH

Ответы

Автор ответа: kansai002
1

в) h2sio3, hcl- кислоты

Автор ответа: koshak2900
0

Ответ:В) Кремниевая кислота и хлороводородная (соляная)

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2. Read the text anddo the tasks below.
A Trip by Plane

An American farmer wanted to make an air trip. There was an airport
close to his farm. So one morning he came there to ask if he could make an air
trip.

"You see," he said to one of the pilots, "I have never
flown before, but I would like to." The pilot told him that the price of
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don't say a word during the whole trip." The farmer agreed.
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The next day at three o'clock the farmer and his wife arrived at the
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didn't say a word.
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(F).
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ship.
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farmer?
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slowly or quickly?
7. Did the passengers speak much during the trip?
8. Did the farmer pay for the trip?
9. What happened to his wife in the air?
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