Предмет: Химия, автор: Данилюккручевсех

Какой обьем занимает 28 г азота 2 ?

Ответы

Автор ответа: Аноним

Дано: м(N2)=28г Найти: V(N2)=? Решение: V=Vм•n n=m/M(молярная масса) М(N2)=14+14=28г/моль n(N2)=28г/28г/моль n(N2)=1 моль V(N2)= 22,4л/моль•1 моль V(N2)=22,4л

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: География, автор: iu787630

география помогите пожалуйста

5 лет назад

Предмет: Английский язык, автор: Аноним

помогите прошу

английский срочно

Заполните пропуски в предложениях подходящими профессиями из рамочки.

5 лет назад

Предмет: Английский язык, автор: bellatrisahard

АНглийский. тест. помогите пжалуйста

By July this year, Sarah White, from here in Gerrards Cross, 1will have finished / will be finishing her A-level exams, but she 2won’t have relaxed / won’t be relaxing on a beach somewhere to celebrate. Sarah and two friends 3will be walking / walk across the Sahara Desert!

People 4leave / will have left water and food at different places along the girls’ route, but they 5will still be carrying / will still have carried 25 kilograms of food, water and equipment on their backs every day. It will be too hot for Sarah and her friends to walk in the middle of the day, so they 6get / will be getting up early in the morning to walk before it gets too hot. Then they’ll rest in their tents until the evening.

‘Our bodies 7will have got used / get used to the high temperatures by then,’ Sarah says, ‘because we’ll stay near the Sahara for a few weeks before we start the trip. But I 8doubt / ’m fairly sure it will be very comfortable to sit inside a tent in temperatures of 45°C! And lots of things 9could / may not go wrong too. Strong winds 10will have / may come in from the Atlantic and blow sand around. This is called a “sand storm”, and if one 11happen / happens on our trip, we 12aren’t / won’t be able to see anything − or go outside our tents for days!’

Mark: ___ / 6

2 Complete the mini-dialogues with the correct form of the verbs in brackets. Use the future continuous, future perfect, or the first conditional.

Paulo 1 (you / go) to the concert with me tomorrow if I 2 (buy) the tickets?

Samantha Thanks for asking me, but the weather forecast for tomorrow is terrible. I 3

(not be) surprised if they 4 (cancel) the concert.

Ellen You 5 (move) to Manchester by the end of September.

Josh Yes, and I’m going to miss you a lot. But I’m sure we 6 (chat) on the internet

all the time!

Mandy 7 (scientists / cure) cancer by 2050?

Rick Maybe. Fifty years from now, perhaps everyone 8 (live) a lot longer than we

do now.

Mark: ___ / 8

3 Write the second sentence. Use the future continuous, future perfect, could, or the first conditional.

1 You can borrow this magazine tomorrow. I / read / it / by then.

2 The concert is at eight o’clock tonight. A few hours from now, / I / dance / to Rihanna.

3 That man is driving quite fast. He / have / an accident.

4 Have you sprained your ankle? It / not recover / if / you / not rest / it.

5 The homework is really easy. You / do / it all / by dinner.

6 We haven’t booked a hotel in Rome. We / stay / with an aunt.

Mark: ___ / 6

4 Complete the sentences with the correct form of the words in brackets. Use prefixes and suffixes.

1 There’s a lot of (sad) in the film, but there are some happy scenes, too.

2 Drink some water, or you’ll become (hydrated).

3 ‘You lied to me!’ Jake said (angry). Then he walked out of the room.

4 I can’t ride a bike at all! I’m (hope).

5 It’s a bad cut, but the doctor will put a (dress) on it.

6 I’m not interested in world events or (politic) news − I only look at the sports pages in the newspaper.

Mark: ___ / 6

5 Complete the sentences with the words below. Use one word to complete two sentences.

bank disgusting frostbite heat intestines oxygen

1 A chicken and banana sandwich − that sounds !

2 Your heart and lungs work harder at high altitude because there’s less .

3 I haven’t got any money in my wallet so I have to go to the .

4 Put some gloves on. It’s freezing, and you don’t want to get .

5 We walked along the river , then went over the bridge.

6 That’s a really big fire. I can feel the of it from here.

7 It takes food about twenty hours to go all the way through your .

5 лет назад

Предмет: Литература, автор: Елизавета1301

Помогите,плиз,сочинение на тему
"В чем не однозначность авторского отношения к главному герою сказа Левша"
Нужно на лист)помогите срочно

9 лет назад

Предмет: Математика, автор: moldirmukhanbet

23-4(3x+8)=1-17x
решите

9 лет назад