Предмет: Химия, автор: talamanovadasha

Оксид углерода (IV) образуется при взаимодействии:
А. Карбоната кальция с водой.
Б. Карбоната натрия с хлоридом калия.
В. Оксида углерода (II) с гидроксидом натрия.
Г. Разложением карбоната кальция.

Ответы

Автор ответа: Apolinaria001

Получают СО2 термическим разложением солей угольной кислоты (карбонатов), например, обжиг известняка:
CaCO3 = CaO + CO2
Поэтому,ответ Г

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: etmahambetovaadia

В емкость, объемом 10 тысяч литров, через два насоса заливается бензин. Второй насос заливает на 10 л бензина в минуту
меньше, чем первый насос. За 10 минут емкость была заполнена на половину. Сколько литров бензина залил каждый насос?
2350 л: 2250 л
2550 л; 2450 л
2650 л; 2550 л
2750 л; 2650 л
2450 л; 23.50 л
Помогите плиз

6 лет назад

Предмет: Английский язык, автор: pronaginaarina

* Circle the correct item.
6
1 There is a few / a little coffee left.
2 My mum needs some / any sugar for this
recipe.
3 There was lots of / not any food on the
table. It was full.
4 Dana eats few / too many sweets. She
should cut down.
5 She had very few / little flour, so she couldn't
make pancakes.
6 We should drink many / a lot of water
every day
7 Would you like some more / less honey in
your tea?
8 Mum put too many / too much salt in the
soup.
9 You don't need much / many butter to
make this cake.
10 Did he eat any rice? Not much / Not many.

6 лет назад

Предмет: Английский язык, автор: tsagynganov

Read the paragraphs 1-4 about the effects of music. Match the headings to the correct paragraphs 1-4.

Music for stress and pain

Get a better score and remember more

The right music to study better

All kinds of music have an effect

1._________________________________

Music is not just entertainment. It is medicine for both the brain and the body. Don Campbell is an expert on The Mozart effect and the incredible power of music. He says that all kinds of music, from Mozart to jazz, from Latin to rock can affect our learning and our health.

2._________________________________

Many people use music to help them feel relaxed after a busy day at work. Music can also reduce the stress of being ill, especially by reducing pain' The director of Baltimore Hospital says that thirty minutes of classical music has the same effect as ten milligrams of the painkiller Valium.

3. _________________________________

Campbell also says that music can help you concentrate but you need the right kind of music for your mood. And you need to listen for about ten minutes before you start studying' Perhaps your mind needs relaxing or maybe you are tired and you want to feel more energetic' So you should choose the appropriate music to help you. You can use many different kinds of music to help you concentrate' Mozart's music is very popular, however because it is very organized and it makes your brain more alert and imaginative.

4.___________________________________

Music helps you to study better and it can also actually make you more intelligent. In one study, students who listened to Mozart before doing a test got much higher marks than those who didn't. Many studies also show that children who learn to play a musical instrument before the age of twelve have better memories for the rest of their lives.

Read the text again. Mark the statements True (T), False (F) or Not given (NG).

Music is good for our bodies and brains. ____

Don Campbell loves Mozart's music. ____

Music helps many people to relax after work. ____

Many hospitals use music to help with pain. ____

Listening to music before you study is a bad idea. ____

Only Mozart's music helps you study. ____

The students listened to Mozart for fifteen minutes before doing the test. ____

It's a good idea for children to learn to play a musical instrument. ____ хэлп дам 50 бллов

6 лет назад

Предмет: Математика, автор: тоди

запиши и реши уравнение: 1) произведение неизвестного числа и числа 9 равно разности чисел 120 и 66. 2) частное неизвестного числа и числа 8 равно сумме чисел 320 и 80. заполни пропуски: 1) 1 м2 50 дм2 = ?дм2, 2) 1 м2 50см2 =? см2

9 лет назад

Предмет: География, автор: NailKooko

приведите примеры тех особенностей жизненного и бытового уклада которые отличают христиан от мусульман буддистов индуистов

9 лет назад