E2.Read the following passage and ...

Hoà tan a (g) hỗn hợp X gồm Fe và kim loại R trong dung dịch H2SO4 loãng vừa đủ thu được 15,68 lít H2 ở đktc và dung dịch C . Cô cạn dung dich C thu được 96,8 g muối khan a. Tìm a b. Biết trong hỗn hợp X số mol Fe bằng 4/3 lần số mol R . Tìm R ?

Finish the second sentence so that it has a similar meaning to the sentence given: 1. I haven’t enjoyed myself so much for years. It’s years since_____________________________________________________ 2. It’s been ages since we last had a party. We haven’t________________________________________________________ 3. We began learning English four years ago. We have__________________________________________________________ 4. She has been working as a secretary for a few months. She started________________________________________________________ 5. Michelle has been studying in London for 6 months. Michelle began_____________________________________________________ 6. How long have you known that teacher? When_____________________________________________________________ 7. When did you first know her? How long__________________________________________________________ 8. When did you first see this film on TV? How long__________________________________________________________ 9. Tom has not had his hair cut for over 6 months. It is over 6 months___________________________________________________ 10. I started to learn English 8 years ago. It is 8 years_________________________________________________________ 11. I last talk to Tom 5 years ago. It is 5 years_________________________________________________________ 12. I haven’t gone to London before. It is the first time_____________________________________________________ 13. It is 20 years since she taught in this school. She has_____________________________________________________________ She began___________________________________________________________ 14. I have never read such an interesting story before. It is the first time______________________________________________________ This is the most_______________________________________________________ 15. I have never met such a famous person before. It is the first time______________________________________________________ This is the most_______________________________________________________

Fill in each blank with the correct linking word 1/Take a coat......it's cold outside

Trả lời trắc nghiệm và nêu tại sao lại chọn đáp án đó

mọi người giải giùm e những câu hỏi này với ạ? Em cảm ơn ạ.

`Tính\:\ 10^2 - 50 +100^2 - 7^3 + 5^4 - 145 = ??`

Mng giúp mik với ạ !!!!!!! Vẽ hình cho mik luôn

1Do you feel like (go)________ to a film or would you rather (stay)________ at home. 2. I’m busy at the moment. I (prepare)________ for the examination since yesterday. 3. This is the first time , She ( eat) _________________________this food. 4. If I (be)________ the President now, I (change)________ a lot of things. 5. Nothing (do)________ since I moved here. 6.He (buy)……………… this house since last year. 7.My mother( advise) ……………me (study)……………….. hard last year. 8.She ( play) __________________________tennis for ten years.

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