Đốt cháy hoàn toàn 5,4 gam nhôm trong bình chứa khí oxi thu được nhôm oxit.
a. Tính khối lượng sản phẩm tạo thành.
b. Tính thể tích khí oxi cần dùng ở đktc.
c. Để điều chế lượng khí oxi dùng cho phản ứng trên thì phải nung nóng bao nhiêu gam kali pemanganat KMnO4. Biết hiệu suất phản ứng là 90%.
Mọi người ơi giúp mình với mai nộp rồi!!!!
6,3333333333
1. Trình bày đặc điểm kinh tế các nước Đông Nam Á?
2. Trình bày Việt Nam trong ASEAN?
3. Nêu những thành tựu to lớn và vững chắc trong Công cuộc Đổi mới toàn diện nền kinh tế nước ta bắt đầu từ năm 1986?
4. Những điểm nổi bật của Vị trí địa lí nước ta về mặt tự nhiên?
5.Kể tên một số khoáng sản có trữ lượng lớn ở nước ta
56+3=59
I. Read the passage and then decide whether the statements arc true (T) or false (F)
The Kiwi
The kiwi lives only in New Zealand. It is a very strange bird because it cannot fly. The kiwi is the same size as a chicken. It has no wings or tail. It does not have any feathers like other birds. It has hair on its body. Each foot has four toes. Its beak (mouth) is very long.
A kiwi likes a lot of trees around it. It sleeps during the day because the sunlight hurts its eyes. It can smell things with its nose. It is the only bird in the world that can smell things. The kiwi’s eggs are very big.
There are only a few kiwis in New Zealand now. People never see them. The government says that people cannot kill kiwis. New Zealanders want their kiwis to live. There is a picture of kiwi on New Zealand money. People from New Zealand are sometimes called kiwis.
1. Kiwis live in Australia and New Zealand. …… ….
2. A kiwi has a tail but no wings. … …….
3. It sleeps during the day because light hurts its eyes. …… ….
4. People in New Zealand do not want all the kiwis to die. ……….
5. The kiwi is a strange New Zealand bird. ……….
Help me!!!!!
I. Give the correct form of the words given to complete the sentences
1. Both French and English are ……………………… languages in Canada. OFFICE
2. The Gold Coast is famous for its most ……………………… theme parks in Australia. ICON
3. There are different kinds of ………………… provided throughout Disneyland. ENTERTAIN
4. Scotland is a …………………… land this is noted for its rich and interesting history. LEGEND
5. Niagara Fall, on the border of the USA and Canada, is one of the most ……………………… scenery in the world. SPECTACLE
6. There are many tourist ……………………… in London such as British Museum, London Eye and Tower of London. ATTRACT
7. The Canadians are native ……………………… of English. SPEAK
8. The silver fern is a national ……………………… of New Zealand. SYMBOLIZE
9. New Zealand is well-known for the ……………………… beauty of its mountains and forests. SCENERY
10. The Glastonbury ……………………… in England attracts thousands of people every year. FESTIVE