user-avatar
taiktvn
2 năm trước
Đốt cháy hoàn toàn hỗn hợp X gồm axit propionic, etyl fomat và metyl axetat thu được 0,6mol CO2. Cùng lượng hỗn hợp X tác dụng vừa đủ với dd chứa a mol NaOH. Giá trị của a là A. 0,3. B. 0,2. C. 0,5. D. 0,25
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Read the passage. Fill in the statements with a suitable word/phrase from the passage.A favourite winter activity is skating. But before you go skating on a pond or lake, there are a few safety tips you should know. The ice should be at least 6 inches thick. Never skate alone. Never assume the ice is safe, and do not go out onto the ice after an animal or toy. Always be familiar with the area where you want to skate, and be sure it is well-lit if you go skating at night. The safest place to go skating is on a skating rink. Some cities have outdoor skating rinks. And most cities have an indoor skating rink you can use for a small fee.When you go skating for the first time, make sure you wear warm socks, a warm hat, and lots of layers of clothing. Most rinks have hot drinks and snacks, but you can also bring your own snacks. Weekends are usually the busiest time of the week to go skating. Weekday nights are usually less crowded. Evening skating can be a lot of fun for the whole family. Most rinks have floodlights. At night, the rink is lit up and bright.1. The thickness of the ice should be …………… as minimum.2. When you go for night skating, it is essential that the skating area is ……………3. To be safest, you shouldn’t go out of the ……………4. You need to pay a …………… to use indoor skating rink.5. You should wear …………… clothes when going skating.6. If you forget to bring foods and drinks, you may get …………… at the rinks.7. If you don’t like having many people at the rink, you can go at ……………8. Evening skating can be a good activity for the whole …………… Rewrite the following sentences based on the given words. 1. I am interested in going camping with my close friends. → (fancy) 2. She can’t bear talking with him about what he likes. → (detest) 3. Watching historical films is very interesting to my younger brother. → (enjoy) 4. It is not a problem to me whether I have to pick her up to the cinema or not. → (mind) 5. Mr. Pike is a big fan of water polo. → (fond)

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team