Cho 4,32g hỗn hợp X gồm hai kim loại kế tiếp nhau trong nhóm IIA tác dụng với dd HCl 5% (vừa đủ) thu được dd A chứa 14,26g hỗn hợp muối.
a) Xác định hai kim loại nhóm IIA và khối lượng mỗi kim loại.
b) Tính C% các chất có trong dd A
c) Tính thể tích dd NaOH 0,5M cần để phản ứng với dd A.
* Giúp mình câu c với ạ
1. Nowadays, advertisements on the media are very important and ___________ in business.
A. considerate B. communicative C. commercial D. standard
2. "We could go to the student center and watch the game on a big-screen TV." --- "____________"
A. Yes, sure B. Yeah, if you like C. Yes, of course D. That's OK. No problem.
3. Good, the noise ___________. I can start concentrating on my work again.
A. stopped B. stops C. has stopped D. had stopped
4. John __________ in Scotland for 10 years. Now he lives in London.
A. lives B. has lived C. lived D. had lived
5. I learnt to drive _________ four weeks.
A. for B. in C. by D. until
6. When she phoned, I ___________ much time to talk because I _________ for Germany in two hours.
A. didn't have / was leaving B. hadn't had / would leave
C. wouldn't have / would leave D. didn't have / had left
tăng lên
21,32,43,54,65,76,87,98
Mk luôn sẵn sàng nhưng mk hết lượt kết bn rùi