Предмет: Химия, автор: lomakonet

сколько литров оксида углерода(IV)выделится при действии хлороводородной кислоты на 25 г карбоната кальция?

Ответы

Автор ответа: udodovi

25г хл
CaCO3+2HCl=CaCl2+H2O+CО2
100г 22,4л
х=25*22,4/100=5,6л

Похожие вопросы

Предмет: Английский язык, автор: nastyakomarova0911

Тема: to be
Задание 1 Заполните пропуски, употребив правильную форму глагола "to be"
1 I _____ a girl.
2 My father_____ at work.
3 Alex and Dino _____ my cats.
4 Alex _____ in the garden.
5 Dino _____ on the floor.
6 My red pencil _____ on the floor, too.
7 The other pencils _____ in my pencil case.
8 My mother _____ in the living room.
9 Eli and Rafa _____ good friends.
10 They _____ good at tennis.
11 _____ they in Amsterdam this week?
12 The pupils _____ not at school today.
13 It _____ Monday.
14 I _____ at home.
15 We _____ friends.
Задание 2 Заполните пропуски, употребив отрицательную форму глагола "to be"
1 I _____ never happy on a Sunday afternoon.
2 We _____ Scottish.
3 He _____ a pilot.
4 Mayte and Joshua _____ angry.
5 You _____ clever and good-looking.
6 You _____ not Dutch.
7 Gemma _____ at home.
8 Agust and I _____ pleased about it.
9 I _____ not cruel.
10 It _____ good.
Задание 3 Заполните пропуски, употребив вопросительную форму глагола "to be"
1 _____ you from Málaga?
2 _____ Isabel Spanish?
3 _____ we ready to go?
4 _____ he married?
5 _____ you tired?
Задание 4 Заполните пропуски формой "to be"
A.
1 Joshua _____ Marco´son.
2 Patty´s mother _____ Joshua´s sister.
3 Beatriz and Marcos _____ their grandparents.
4 They _____ Cristina´s parents.
5 Cecilia and Victor _____ María´s children.
6 Janice _____ my grandmother.
7 My father´s name _____ Juan.
8 Francisco and Jaime _____ from Colombia.
1 It ___ a donkey. It ___not a horse.
2 It ___ very hot today. It ___ not very comfortable.
3 I ___ Peter. I ___ not Paul.
4 She ___ Miss Lee. She ___ a teacher.
5 He ___ my father. He ___ a doctor. He ___ not a lawyer.
6 You ___ a stranger. You ___ not my friend.
7 We ___ in the same class, but we ___ not on the same team.
B.
1 The camel ___ a desert animal.
2 Vegetables and fruit ___ healthy foods.
3 Lambs ___ baby sheep.
4 Kenneth ___ a lawyer.
5 Rex ___ a clever dog.
6 A duck ___ a kind of bird.
7 The playground ___ full of people today.
8 My house ___near the school.
9 The questions ___ not too difficult.
10 The balloons ___ very colorful.
C.
1 They ___ my good friends.
2 He ___ a soldier.
3 You ___ taller than Charlie.
4 She ___ ill.
5 We ___ very hungry.
1 John´s dog ___ very friendly.
2 Robert ___ ten years old.
3 These flowers ___ very pretty.
4 The two schools ___ close to each other.
5 Math ___ not a very difficult subject.
6 ___ dinner ready?
7 This computer ___ very easy to use.
8 All the windows ___ open.
9 Sue and Jane ___ neighbours.
10 His hair ___ curly.
Задание 5 Преобразуйте предложения в отрицательные.
1 The British Isles are in Africa.
2 The Mediterranean is an ocean.
3 The Alps are in America.
4 The Nile is in Asia.

7 лет назад

Предмет: Математика, автор: mahonya19999

Найди значение выражения.
4 7/12-1 5/12+ 2 11/12 =

7 лет назад

Предмет: Математика, автор: kseniapolkovnikova77

Замените выражение равным ему выражением, не содержащим скобки a-(-y)+(-9)

7 лет назад

Предмет: Геометрия, автор: Happy0

Образующая конуса равно корень из 10 см и составляет с плоскостью основания угол 45. Найти высоту конуса, Sбок, объем.

10 лет назад

Предмет: Физика, автор: oklol

Уравнение Эйнштейна для фотоэффекта

10 лет назад