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Iamtuyen2000
2 năm trước
Hòa tan 24 gam đông (II) oxit CuO trong 245 gam đ H2SO4 20%. a) Lập PTHH của pỨ b) Chất nào còn thừa sau pứ? Khối lượng thừa là bao nhiêu ? c) Tính nồng độ % các đ thu được sau pứ
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I. Read the passage, then write the answers to the questions (5pts). This is the library in Nam's school. It is not very large, but it is very nice. In the library, there are a lot of books, novels, readers, magazines, newspapers and pictures. There is also a study area. The library opens at seven o'clock in the morning and closes at 4.30 in the afternoon. Nam often goes there. I le likes reading books in the library. 1. Is the library in Nam's school nice? ……………………………………………………………… 2. Why does Nam often go there? ……………………………………………………………… 3. What time does it open? ……………………………………………………………… 4. What time does it close? ……………………………………………………………… 5. Is there a study area in the library ? ……………………………………………………………… II. Underline the mistake and correct it (5pts). 1. Where’s Lan? - She waters flowers in the garden. ……………………………………………………………………. 2. This worker works harder than any others workers. ……………………………………………………………………. 3. Lan spends three hours a day to do her homework. ……………………………………………………………………. 4. We often have a two-months vacation each year. ……………………………………………………………………. 5. Farmers have a fewer days off than workers. …………………………………………………………………….

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