Предмет: Химия, автор: Tsjt

У воді масою 147г розчинили 3г. Обчисліть масову частку розчиненої речовини

Ответы

Автор ответа: svetka1574

0

Ответ:

Объяснение:

Дано

m(р-ля) = 147 г

m(в-ва) = 3 г

Найти

W(в-ва)

m(р-ра) = m(в-ва) + m(р-ля) = 3 + 147 = 150 г

W(в-ва) = m(в-ва) / m(р-ра) *100% = 3 / 150 *100% =2%

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Окружающий мир, автор: Evangaika

Чем можно заменить ядохимикаты в сельском хозяйстве? Заранее спасибо!

1 год назад

Предмет: Окружающий мир, автор: Evangaika

Чем можно заменить ядохимикаты в сельском хозяйстве? Заранее спасибо!

1 год назад

Предмет: Английский язык, автор: artemrudenko0

Помогите с Английским языком 4, 5, 6 задание!!!! Даю 50 баллов.

4 Choose the correct answers.
1 The United Kingdom is … .
a republic b) a monarchy c) a federation
2 The head of state is … .
a The Queen b) President c) the Prime Minister
3 The British Parliament sits in … .
a one building b) two buildings c) three buildings
4 MPs are … .
a the people who sit in the house of Lords
b the people who sit in the house of Commons
c all the people in the House of Parliament
5 What are Britain’s main political parties?
a Labour and Conservative
b Democratic and Republican
c Conservative and Democratic
6 How do Members of Parliament get into the House of Commons?
a The Queen chooses them
b British people elect them
c They inherit their seats from fathers and grandfathers.
7 Who presides over the House of Commons?
a a the Speaker b) the Lord Chancellor c) the Prime Minister
5 Fill in gaps. Use: when, who, which, that, where, whose. Put commas where necessary.
1 I need a friend _____ will never let me down.
2 Kate ______ is a teacher at our school has never been abroad. She is afraid of flying.
3 My grandfather ______ sweater you are wearing was a very nice man.
4 The theatre _______ you have seen in the pictures isn’t far away from here.
5 My friends went to Spain _____ it’s warm and sunny.
6 His parents were doctors _____ worked in the hospital down the road.
7 Look at Mary. She has seen something _____ scared her.
8 The Pushkin novel ______ I like best is Barishnya Krestyanka.
9 I’ve read a book ______ was very interesting.
10 The benches ________ are in the House of Lords are red.
6 Use the suffixes –tion, or – ment and form the nouns from the verbs.
Agree, elect, discuss, explain, demonstrate, improve, manage, inform, collect, equip

1 год назад

Предмет: Алгебра, автор: lubaKorobkova

x²+16=0
Решение пожалуйста

8 лет назад

Предмет: Математика, автор: персик1110

Приведите пример натурального числа, большего 14, которое делится на 14 и делится на 8

8 лет назад