Предмет: Химия, автор: sheglow2132

для реакции нужно 0.5 моль CuO сколько грамм CuO нужно взвесить

Ответы

Автор ответа: naugros

находим массу одного моля CuO=64+16=80
составл. пропорцию:
1 моль----------------------------80гр
0,5моля---------------------------хгр
х=0,5*80/1=40гр
Ответ масса оксида меди=40грамм

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: ekaterinasacilo126

1 Eighty years ago, there ...... an airport on the
island.
A weren't B isn't C wasn't
15 A: What do you think of Up?
B: A It's a comedy film. B It was expensive.
C It's great. You should see it.
16 Did girls ..... miniskirts and boots in the 60s?
A wore
B wears C Wear
2 A: Did ancient Egyptians play board games?
B: Yes, they ......
A could B had C did
3 A: What did you do yesterday evening?
B: A Nothing special. B I didn't like it at all.
C Not really
17 The streets were ..... of people.
A narrow B full
C crowded
18 The ..... of the volcano destroyed the village.
Aash
B eruption C effect
19 The Vikings ..... fast boats.
Adid
B built
C traded
4 A: It sounds like you loved it.
B: A Yes, it was amazing.
B Yes, I saw it yesterday.
C No, they don't
5 ..... there public baths in Pompeii?
A Had
B Were C Was
20 He ..... newspapers at the age of 10.
A delivered B helped C left
21 They ..... on the Pacific Ocean when pirates
attacked them.
A could sail B were sailing C are sailing
6 The Navajo were farmers and they ..... crops.
A made
B built
C grew
..
22 Macchu Picchu is an ancient Inca
A sight
B site
Cfield
7 A: Was it a bit dull?
B: A Not at all.
C No, I wasn't.
B No, I don't
8 A: Do you miss your old neighbourhood?
B: A Yes, sometimes I do. B Yes, we did.
C No, they don't
23 The film had great special ......
A effects B acting C plot
24 He likes comedies because they are ......
A scary
B sad C funny
25 He didn't ..... them leave the building.
A saw
B see C sees
26 The ancient buildings in Peru had ..... walls.
A thick
B plump C curly
9 The ancient Egyptians ..... build pyramids from
stone.
A were
B had C could
10 The Cheyenne ..... buffalo for food.
A farmed
C hunted
B grew
27 I don't like science ..... films.
A comedy B Western
C fiction
11 Only boys ..... school.
A arrived
B taught C attended
12 The city dates ...., to the 15th century.
A off
B from C back
13 They ..... goods on their boats.
A constructed B ruled C transported
28 They lived in a block of
A shops
B flats
C departments
29 The eruption of Mt Vesuvius ..... the city under
ash.
A destroyed
C buried
30 They fished ..... the River Nile.
A in
C of
B put
14 In the past, the Kwakiutl ..... their houses out
of wood.
A makes B made C make
Bover
52

6 лет назад

Предмет: Немецкий язык, автор: polina22255

СРОЧНО! НЕМЕЦКИЙ помогите пожалуйста

6 лет назад

Предмет: Геометрия, автор: banceranastasia40

Знайдіть площу ромба, діагоналі якого дорівнюють 8 м і 20 м.

6 лет назад

Предмет: Биология, автор: feеd

почему обмен веществ считают основным признаком жизни

10 лет назад

Предмет: Математика, автор: MaximPeftiev123

Одна сторона прямоугольника равна 10 см-в 3 раза больше.Найдите площать прямоугольника

10 лет назад