Ольга Используем таблицу Менделеева. Находим атомную массу элемента и умножаем на количество атомов данного элемента в молекуле. Так для каждого входящего в молекулу элемента — затем суммируем.
Например: M(N2) = 2 * 14 = 28, т. к. атомная масса азота по таблице = 14
Задание
Развернуть задание
What advice is given to tourists? Why? Discuss.
Example:
A: Tourists are advised not to throw rubbish into the sea because …
B: Yes, and …
Example:
A: Tourists are advised not to throw rubbish into the sea because …
B: Yes, and …
Развернуть задание
Новое решение
Решение
A: Tourists are advised not to throw rubbish into the sea, for it may contain chemicals that will pollute the water.
B: Yes, and rubbish might also float to the surface, which looks terrible.
A: Tourists are advised to be careful what they do with waste water, because washing-up liquid and bleach can harm the coral.
B: It’s true, and it is also recommended not to buy piece of corals, but to tell immediately the authorities about the illegal trade.
A: What’s more, tourists are advised not to fish and not to take shellfish and other creatures out of the sea, for the reef is their home.
B: Yes, and rubbish might also float to the surface, which looks terrible.
A: Tourists are advised to be careful what they do with waste water, because washing-up liquid and bleach can harm the coral.
B: It’s true, and it is also recommended not to buy piece of corals, but to tell immediately the authorities about the illegal trade.
A: What’s more, tourists are advised not to fish and not to take shellfish and other creatures out of the sea, for the reef is their home.
A: Tourists are advised not to throw rubbish into the sea, for it may contain chemicals that will pollute the water.
B: Yes, and rubbish might also float to the surface, which looks terrible.
A: Tourists are advised to be careful what they do with waste water, because washing-up liquid and bleach can harm the coral.
B: It’s true, and it is also recommended not to buy piece of corals, but to tell immediately the authorities about the illegal trade.
A: What’s more, tourists are advised not to fish and not to take shellfish and other creatures out of the sea, for the reef is their home.
B: Yes, and rubbish might also float to the surface, which looks terrible.
A: Tourists are advised to be careful what they do with waste water, because washing-up liquid and bleach can harm the coral.
B: It’s true, and it is also recommended not to buy piece of corals, but to tell immediately the authorities about the illegal trade.
A: What’s more, tourists are advised not to fish and not to take shellfish and other creatures out of the sea, for the reef is their home.