1) my brother doesn't have enough money to buy this book
-> my brother wishes ................................
2) what a pity! Peter is sick today.
-> we wish ..........................
3) he will absent from the class discussion tomorrow.
-> he wishes .....................................
4) what a pity! We can not try all the special food of the village
-> we wish ..........................
5) their team don't play very well.
-> they wish .......................
6)Lien never goes on a camping trip.
-> lien wish .......................
7) the doctor feels sorry because he can't cure all the patients.
->the doctor wishes ................
8) he is sorry that he can't see Audrey on her trip to London
->he wishes ......................
9)the teacher would like every member in class to behave peacefully
->the teacher wishes ..........................
10) Minh doesn't speak English as well as Lan.
-> Minh wishes he ................

Để điều chế 7,437 lít (đkc) hydrogen trong phòng thí nghiệm người ta dung kim loại magnesium

a) Tính khối lượng magnesium

b) số mol hydrogen trên chính là số mol hydrogen thu được khi dùng hỗn hợp (a) gồm iron và aluminium, biết tỉ lệ số mol hydrogen thoát ra lần lượt do iron và aluminium là 2:3. Tính khối lượng hỗn hợp (A) dùng