(0,5 điểm) Carnallite là muối khoáng, thành phần gồm có KCl và MgCl2 ngậm nước. Khi nung nóng 5,55 gam carnallite thu được 3,39 gam muối khan. Mặt khác, nếu cho 5,55 gam carnallite tác dụng với dung dịch NaOH thu được kết tủa. Nung kết tủa đến khối lượng không đổi thì khối lượng kết tủa giảm 0,36 gam. Xác định công thức hóa học của carnallite.
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

1. I couldn't go to school yesterday because I was ill.
2. I'm going to the park. Do you want to come with me? – No, thanks. I must finish my homework.
3. You shouldn't spend much time playing games if you want to get better grades.
4. A. Why were you late yesterday? B. My mom’s car broke, so I had to walk all the way to school.
5. A. Do you want me to give you a lift home after school? B. No. No, you don’t have to. My mom’s picking me up.
6. A. I can't understand this exercise. Can you help me, please? B. Ok, sure.
7. Do you know where Peter is? I'm not sure, but he must be at the computer lab.
8. Can you call me later? I'm busy now, I can't talk with you.
9. We must bring our books because we’ll have a test tomorrow, we won’t have new lessons.
10. You mustn't smoke here. Look at the sign!


1a) How often does your sister eat candy? b) Every day because they are delicious!
2a) What's the matter?
b) Ouch! I have a toothache. I don't eat candy anymore if I do, my tooth will hurt more!
3a) What food do you have at the party?
b) We have burgers, pizza, chips and chicken.

\(\)We normally use the present simple with time expressions such as: usually, never, everyday, always,...
We normally ..use.... the present simple with time expression such as: usually, never, everday, always,...