Учень, виконуючи завдання вчителя, замість 7% розчину повареної солі приготував 40 г - Znanija.Site

Учень, виконуючи завдання вчителя, замість 7% розчину повареної солі приготував 40 г розчину, 3 масовою часткою розчиненої речовини 10%. Як йому виправити цю помилку?
- Предмет:
  Физика
- Автор:
  kayliesutton
- 1 год назад

Ответы 1

Відповідь:
додати 17.1/7 г розчину без солі
Пояснення:
10% від 40 це 4
4 це 7% , тоді 4/7 × 100 = 17.1/7
- Автор:
  dominiqueioxy
- 1 год назад
- 10
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