Предмет: Химия, автор: lovalika

определите объем водорода образующегося взаимодействием 12г магния с соляной кислотой

Ответы

Автор ответа: neTyxD

g + 2HCl = MgCl2 + H2
1моль 2моль 1моль 1 моль
m(Mg)=6гр
n(Mg)=m/M=6:24=0/25 моль

0.15 моль Mg-----x моль Н2
1 моль Mg-----1 моль Н2

n(Н2)=0.15моль
v=n*Vm=0.25*22.4=5.6 л

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Другие предметы, автор: arivelkaroblox

Рассмотри рисунок.Составь три цепи питания.СРОЧНО!!ЭТО ПО СОЧУ

7 лет назад

Предмет: Английский язык, автор: nazekkaay

можете помочь с английским. текст вверху.

1Task 1. choose the correct letter a, b, cor d.

1)in the blog post, jessica is describing
a. the problems with the environment in the amazon.
b. how to look after the animals of the rainforest.
c. her time working with animals in south america.
d. her daily routine over the past year.

2) what jessica's attitude to the selling of animals from the amazon?
a. she did not realise that it damaging.
b. she believed there was nothing she could to do help.
c. she felt angry and disappointed.
d. she wanted to help whatever way she could.

3. how did jessica feel about life at the centre?
a. she found it boring and uninteresting.
b. she found the days long and tiring.
c. she thought it was easy and relaxing.
d. she enjoyed the variety of daily life.

4. how did jessica feel when the monkeys were returned to the amazon?
a. she was upset that they were not saying in the centre. b. she was happy that they were doing to the right place. c. she was worried about their future in their natural habitat
d. she thought they would have a better life at the centre.

5)what might jessica say to her friend about her experience?
a. i enjoyed my time at the centre, and i think you would enjoy it too.
b. i saw some interesting things, but i am glad to be home.
c. i took care of lots of animals but some of them could be scary.
d. it was good to do something useful, although it was often dull.

7 лет назад

Предмет: Алгебра, автор: abdikarimarnur2

3. Көбейткіштерге жіктеңіз:mx2+my2-nx2-ny2+n-m пж мне нужно сейчас

7 лет назад

Предмет: Алгебра, автор: kisskiss12

Вычислите: 4sin^2 *120°-2cos600°+√27 660°

10 лет назад

Предмет: Математика, автор: yulia270784

з кожних 100кг свіжих фруктів виходить 18 кг сушених.скільки кілограмів сушених фруктів одержимо з 900кг свіжжих?

10 лет назад