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susun7076
2 năm trước
Cho 10g hh gồm Cu và Ca tác dụng vs dd H2SO4 10% thu được 0,56l khí H2 (đktc) a) Tính % kl mỗi kim loại trong hh b) Tính m đ H2SO4 đã dùng biết đã dùng dư 20% so vs nhu cầu giúp vs .......................
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Read the following passage and answer the questions. London is famous for many things. Tourists come from all over the world to tour its historic buildings. They also visit its theaters, museums and many of its stores, such as Harrods, where you can buy just about anything. Like many big cities. London has traffic and pollution problems. More than 1,000,000 people a day use the London Underground, but there are still too many cars on the streets. The air is not clean, but it is cleaner than 100 years ago. The best thing about London is the parks. There are five in the city center. But my kids' favorite place is Hamleys, the largest toy store in the world. It is 200 years old. 2. Where are the traffic and pollution problems? …in the big city in london……………………………………………………. 3. What is the best thing about London? …… favorite place is Hamleys……………………………………………………. 4. How many parks are there in London? …………………….

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