Предмет: Химия, автор: ftdjsh

определить объем CO2, который образуется при 8,8 г пропана(C3H8), если доля выхода продукта реакции составляет 85%

Ответы

Автор ответа: shuhnina

2С3Н6 + 10О2 = 6СО2 + 8Н2О
88 134,3л
находим массу СО2 = 8,8г*134,4л/88г = 13,4л
13,4------- 100%
Х -------- 85%
Х =13,4*85/100 = 11,4л(О2)

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: kiberkotleta123567

помогите срочно пж, математика 6 класс

5 лет назад

Предмет: Английский язык, автор: volk132krez

Прочитай текст и выполни задания после него.

The weather forecast

We get wet through when we are caught in a rainstorm without a coat. Sometimes we put on a sweater and then find that the weather has become hot. We do not always know what weather to expect. It is more serious when farmers lose their harvest because of rain, or a sailor gets into trouble when the wind rises. On TV and radio there are daily weather forecasts. Sometimes, the forecast is not quite right as the weather is not an easy thing to forecast. All day and night, weathermen are collecting information from ships, planes weather stations, and space stations. With the help of this information, they can understand what the weather will be like during the next few days.

Although no two days will have exactly the same weather, some types of weather people can forecast.

When a barometer shows high pressure, the weather will be calm. In winter it will be cold and frosty. In summer it usually means misty mornings and hot sunny days. When the barometer shows low pressure, look out for rain and strong winds.

As a result of the weathermen`s work we learn about the weather. This is one of the forecasts made by the BBC.

“ Good evening, and here is the weather forecast for tomorrow.

Scotland will be cold with snow in the mountains. In the north of England it will be a wet day with heavy showers that will move to Northern Wales during the afternoon. The Midlands will be dry but cloudy. In the south of England the day will be bright and clear with a lot of sunshine but it may be windy in the evening”

Задание 1. Прочитайте текст. Определите, какие из приведенных утверждений соответствуют содержанию текста (True) какие не соответствуют (False)

1. Weathermen collect information from universities, colleges and offices.

a) True b) False

2. If the barometer shows low pressure, the weather is rainy and windy.

a) True b) False

3. We never know what weather to expect and there`s nothing that can help us.

a) True b) False

4. For some people it`s very important to know the weather forecast.

a) True b) False

5. When the weather is cold and frosty in winter, the barometer shows high pressure.

a) True b) False

II Use of English

Задание 1.

Fill in the appropriate words: environmental, damage, predictions, natural,, fruitless,

1. Air, water pollution and huge landfill sites are the most important _____ problems.

2. Droughts have turned this oasis into a _______ desert.

3. Thanks to modern technologies hurricanes can’t do much ______ to these buildings.

4. Alarming ______ of this famous scientist made everyone shiver.

5. In the USA tornadoes are the most widespread ______ disasters.

Задание 2. Выбери правильный вариант ответа.

1. We (not / have) a holiday last year.

A didn't have В haven't had С hadn't have

2. - Tim has broken his leg and stays at home.

- Sorry to hear that. I (visit) him tomorrow

A will visit

Вam going to visit

3. Do you know Kate's phone number?

- I've bad memory for phone numbers, but I (look) for it in my note-book.

A will look

Вam going to look

4. Tomorrow (be) Friday.

A will be В is

5. Don't worry about your letter, I (send) it the day before yesterday.

A sended Вhave sent С sent

Задание 3. Напишите правильный вариант условных предложений

1) If I …………. (know) his number, I would phone him.

2) I .................. (not / buy) that computer if I were you.

3) If the weather is fine, we ……… (have) a picnic tomorrow.

4) We would need a car if we .................. (live) in the country.

5) I'm not tired. If I .....................( be) tired, I would go home now.икова" М. Ю. Лермонтова предложения с обращением.

5 лет назад

Предмет: Химия, автор: litovcenkodaniil09

Чему равна сумма всех коэффициентов в уравнении реакции: Fe + O₂ → Fe₂O₃

5 лет назад

Предмет: Математика, автор: ОЛЬГАR

В ГАРАЖЕ СТОЯЛО 35 АВТОБУСОВ, 13 ТРАМВАЕВ,А ТРОЛЛЕЙБУСОВ СТОЛЬКО, СКОЛЬКО АВТОБУСОВ И ТРАМВАЕВ ВМЕСТЕ. СКОЛЬКО ВСЕГО МАШИН?

9 лет назад

Предмет: Химия, автор: SkiLas

вычислите массу бромной воды, которая потребуется для полного взаимодействия со 186 г 1% раствора анилина!!!

9 лет назад