1. Circle the correct answer. 1. His parent would be very proud if he (wouldn't be/ weren't) so naughty. 2. If Jane had more money, she (would treat/ treated) herself to a decent meal. 3. If you were a billionaire, what (would you dol did you do)? 4. If Kate owned a computer, she (would spend/ spent) most of her free time on it. 5. IfI (would know/ knew) his address, I would give it to you. 6. She would look much better if her hair (didn't look/ wouldn't look) so unkempt. 7. If I were in your situation, I (would/ will) let the nature take its course. 8. If I (lived/ would live) in Japan, I could speak Japanese well. 9. If someone gave you a dress, which color (would you want/ you would want) it to be? 10. I would repair the roof myself if I (would have/ had) a longer ladder. 11. You would be more comfortable now if you (didn't/ wouldn't) wear high heels. 12. I (wouldn't/ didn't) buy things on the Internet if I were you. 13. If you (met/ would meet) your favorite author Mark Twain, what would you ask him? 14. I (would buy/ bought) a new house if I had enough money. 15. If he (would try/ tried) his best, he might be successful. 2. Put the verbs in bracket into the correct form. 1. I could watch foreign TV programs without subtitles if I (know) English. 2. He might be obese if he (not stop) 3. If he knew that it was dangerous, he (not do) taking in fat and sugar. it. 4. If you (see) 5. She (be). someone drowning, (you/ save) him? happier if her parents (not get) under a mosquito net, you (not be). divorced. 6. If you (sleep) bitten often. 7. I(get) 8. If she (have) a job easily if (have) another hair style, she (look) a degree. younger. 9. If the weather (not be) severe, our crops (grow) faster. 10. I (keep) a horse if I could afford it. 11. More tourists would come to our country if we (provide) better services. 12. If I studied abroad, (we/ keep) in touch with each other?

1. Tính số nguyên tử hoặc số phân tử có chứa trong n mol chất
Ví dụ 1. Tính số phân tử Cl2 có trong 2 mol phân tử Cl2
2. Tìm số mol có trong A nguyên tử hoặc phân tử
Ví dụ 2. Tính số mol H2O có trong 1,8.1023 phân tử H2O
3. Tìm số mol có trong A nguyên tử hoặc phân tử
Ví dụ 3. Tính khối lượng của 9.1023 nguyên tử Cu
4. Tính số mol chất trong m (gam) chất
Ví dụ 4. Tính số mol phân tử CH4 có trong 24 (g) CH4
5. Tính khối lượng của n (mol) chất
Ví dụ 5. Tính khối lượng của 5 mol H2O
6. Tính thể tích mol chất khí ở đktc
Ví dụ 6. Tính thể tích của 3 mol khí trong V lít khí CH4 ở đktc?
 

viết một bài thu hoạch về các di tích lịch sử ở Hà Tây

Nhanh lên giúp mik với

a. Khi sôi thì nước sẽ bị bốc hơi, nhưng do đậy vung nên hơi nước không thoát ra ngoài được $\Rightarrow$ hơi nước tụ lại thành nhiều giọt nước trên nắp vung.

b. Có vị giống nước bình thường. Nước trong nước muối đã bay hơi.

A