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Перепишите уравнения, в которых необходимые коэффициенты. При необходимости выставить коэффициенты.
Sr+O2 ---> SrO
Ga+O2 --->Ga2O3
Tl+O2 ---> Tl2O
Tl+S --->Tl2S
Ge+F2 ---> GeF4
Sr+N2 ---> Sr3N2
Sn+P ---> Sn3P4-
Предмет:
Химия -
Автор:
xzavieriwsk - 6 лет назад
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Ответы 1
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2Sr+O2 ---> 2SrO4Ga+3O2 --->2Ga2O34Tl+O2 ---> 2Tl2O2Tl+S --->Tl2SGe+2F2 ---> GeF43Sr+N2 ---> Sr3N23Sn+4P ---> Sn3P4
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Автор:
cole44 - 6 лет назад
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My favourite place for water sports is Lake Vinney, but it has only existed since 1975 when the valley was filled with water to provide electricity. Under the water is the village, Vinnthrope. Last week I talked to Pat Smithers, who runs a shop on the edge of the lake and looks after a huge cap park. She gets up early to travel to her shop to sell newspapers and food and doesn’t finish work till late because of the car park. She said drowning the village was the best thing that ever happened, as it brought a lot of business to the area, and the number of visitors from all over the country continues to increase, especially as there is a new road which means it is easier to get to. When I asked people enjoying the water sports, they said they never thought about the drowned houses and streets. When I spoke to some people in the café overlooking the lake, I was surprised they still get angry about what happened. They used to live in Vinnthrope and were moved to other places in the area, among them thirty children who are now middle-aged, but they still miss the village. They say that nobody asked them what they wanted – they were told one day that everything was decided. They were separated from their friends and had to get buses to new schools instead of walking there together. It is a shame that these people lost their homes, and I hope something similar never happens again in the future. I would miss the water sports if they weren’t there, however, and I must say that I hadn’t ever thought about what was under the water until last week. Вопрос № 1 1 балла(ов) 1. What is the writer trying to do? A. Describe what people think about the drowned village. Это правильный ответ B. Persuade people to take up water sports on Lake Vinney. C. Discuss what might happen to Lake Vinney in the future. D. Explain why people like living by Lake Vinney. Вопрос № 2 1 балла(ов) 2.What do we learn about Pat Smithers? A. She lives beside the lake. B. She used to live in Vinnthrope. C. She often visits the area on holiday. D. She earns her living near Lake Vinney. Это правильный ответ Вопрос № 3 1 балла(ов) 3. What do we find out about Lake Vinney? A. It attracts tourists from abroad. B. There are lots of houses on the banks. C. More people are visiting it every year. Это правильный ответ D. Mainly local people do water sports there. Вопрос № 4 1 балла(ов) 4. What does the writer think about Vinnthrope? A. He agrees with Pat Smithers. B. He feels sorry for the people who lived there. Это правильный ответ C. He thinks it should now be forgotten. D. He has always felt guilty about water-skiing there. Вопрос № 5 1 балла(ов) 5. Which of these an advert for lake Vinney? A. Come to Lake Vinney and water-ski or sail. No ugly car parks, shops or cafes around the lake to spoil the view. Это правильный ответ B. Come to Vinnthrope and stay in a hotel in the village. Enjoy the walks around the lake in complete peace and quiet. C. Lake Vinney is perfect for all kinds of water sports. Wonderful café by the side of the lake and plenty of car-parking space. D. Enjoy water-skiing on Lake Vinney, but leaves time to visit the old village beside the lake – nothing has changed there for 30 years.
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