user-avatar
phuonglinh271ct
2 năm trước
Bài 4: Cần điều chế lượng đồng sunfat. Phương pháp nào sau đây tiết kiệm được axit sunfuric nhất. Viết PTHH. a. Axit sunfuric đặc tác dụng với Đồng kim loại b. Axit sunfuric tác dụng với Đồng (II) oxit. c. Axit sunfuric tác dụng với Đồng (II) hiđroxit Bài 5: Một hỗn hợp gồm 18,6 gam kẽm và sắt tác dụng với dung dịch axit sunfuric loãng, dư. Thể tích khí H 2 (đktc) được giải phóng sau phản ứng là 6,72 lít. Tính thành phần phần trăm của mỗi kim loại có trong hỗn hợp?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Chuyển sang bị động : 1. Garbage is covering the street. …………………………………………………………………… 2. People think we had to keep our environment unpolluted. …………………………………………………………………… 3. Do you need to hand in the test paper so quickly. …………………………………………………………………… 4. Have you met anyone in the office?- Sorry, I wasn’t able to see anybody. ……………………………………………………………………… 6. People thought he had had his father make the toys. ……………………………………………………………………… 7. Don’t look at my writing, Ba. …………………………………………………………………… 8. She will get me to bring her the lugguage. …………………………………………………………………… 9. I see him run in the park in the morning. ……………………………………………………………………… 10. We watched the people cheer in the stadium last week. ……………………………………………………………………

Fill in the blank with a suitable word given below. relive , school days , get away , get back , wake up Everyone wants something from teenagers. They try, but it seems never good enough. Teenagers have to (1) ……………… for school at six in the morning, after a night staying up late doing homework. Getting ready for school is a daily routine that brings anyone on stress. Teen girls would love go to school with their hair up in a bun, and in pajamas, but that would only make them feel like an outcast. Picking out clothes and making their hair “perfect” is surely a stressful way to start the day. (2) …………… are stressful to begin with. Six and a half hours of teachers bickering and nagging at students to do things. Teenagers try to relieve their stress in different ways. They try to run their problems, or they to shut everyone else out but the stress is always right there waiting for them. Parents bring the teen on more stress, nagging about chores and work and it only makes things worse. At this point teens just want to (3) …………….. from everything and anyone. Facebook is usually a great distraction from everyday issues, but it only brings on more drama and problems. Teenagers use Facebook as a way to vent their feelings and aggressions towards other people, which starts a ton of drama. Girls in high school seem to think Facebook is a way to (4) ……………… at other girls for whatever reason. They post mean things and hurtful comments that start drama and fights. Not everyone has a stress-free home life, but the six and a half hours teens spend at school every day shouldn’t be so stressful. If teenagers weren’t so stressed out then, they could certainly achieve more with their lives. There are ways for teenagers to have a successful day with no stress, but it requires everyone doing their parts to be stress-free. If everyone had an open mind when they woke up in the morning then surely their days would start off better. If everyone did their parts to help each other out and not start drama then teenagers wouldn’t be as stressed out as they are. Teenagers should continue to find ways to (5) ……………… their stress in healthier ways such as sports and arts. Finding a hobby will make each and every day better for a teenager. Answer the questions: 1. Why do the teenagers need to stay up late at night? ............................................................................................................. 2. Why do parents bring teenagers more stress? ............................................................................................................. 3. Why do teenagers tend to use Facebook more? ............................................................................................................. 4. What will happen if someone wakes up in the morning with an open mind? ............................................................................................................. 5. How can teenager relive stress in healthier ways? .............................................................................................................

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