user-avatar
duyenhuyenton
2 năm trước
Cho 11,2 gam sắt tác dụng vừa đủ với dung dịch HCl 2M, sau phản ứng thu được dung dịch X và khí H2. (a) Viết phương trình hóa học xảy ra và tính thể tích dung dịch HCl đã dùng. (b) Tính thể tích khí H2 thu được ở đktc. (c) Cho lượng khí H2 thu được ở trên qua 8 gam CuO, nung nóng. Sau phản ứng thu được m gam nước. Tính m. giải kiểu lớp 8 đấy nhé các tiền bối
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

151. The book is________the chair. Please put it on the table. A. in B. at C. under D. from 152. We are going to ________in a hotel. A. speak B. visit C. stay D. say 153. Which ________do you speak ? A. nationality B. language C. country D. nation 154. ________does Peter go jogging?- Everyday A. How often B. How C. How Long D. When 155. Do you go to school ________ bus? A. on B.by C.with D. at 156. I often ________ to music in my free time. A. watch B. see C. visit D. listen 157. What ________you do?- I’m a student. A. does B. do C. are D. is 158. They________go camping because they don’t have a tent. A. always B. sometimes C. never D. often 159. When it’s________, Ba goes swimming. A. cold B. cool C. warm D. hot 160. Lan is going ________ a picnic this Sunday. A. have B. having C. to have D. has 161. What is your sister doing now?- She ________. A. is cooking B. are cooking C. cook D. cooks 162. There is____ water in the bottle. A. any B. many C. some D. a 163. What color is _______ hair ? It’s black A. your B. you C. me D. I 164. We go to the movies________ Sunday evening. A. to B. at C. on D. in 165. It's very ________ in the winter. A. cold B. hot C. cool D. warm 166. - How ________ is a sandwich? - It's 2,000 dong. A. many B. much C. old D. often 167. - How________ does she go jogging? - Every evening. A. many B. much C. often D. old 168. ________ is the weather like in the summer? A. What B. Which C. How D. Where 169. The Nile river is the ________river in the world . A. long B. longer C. longest D. shortest 170. ________does Mr Hai travel to work ? By car . A. How B. why C. What D. Where Giúp mình với hiện tại mình đang cần gấp ạ.

PART C. DIALOG COMPLETION Circle the sentence that best completes each of the following exchanges. 1. Minh: “I’m taking a physics test tomorrow.” Mom: “_____________” A. No, I don’t care. Giáo Viên Chuyên Anh - Thầ y Bùi Văn Vinh - 0988.333.599 13 B. Good luck! C. Congratulations! D. I hope so 2. Kelly: “Would you mind voluming down, please? I’m studying.” Joe: “_____________” A. I’m studying, too. B. No, thanks. C. Not at all. I’ll do it right now. D. No. I won’t do it. 3. Alex: “Would you like to join in Go Green campaign this summer?” Teddy: “_________.” A. Should I? B. Is that OK? C. Yes, I’m coming. D. Yes, I’d love to. Thank you! 4. Tina: “Can I have another glass of water?” Joshua: “__________” A. Help yourself! B. Do it yourself. C. No, thanks. D. Never mind. 5. Phil: “Excuse me! How do I get to the bookstore?” Mary: “___________” A. You can go by bike. B. Sorry, I’m not around from here. C. It closes in 5 minutes. D. There are lots of books there. II. Put the correct form of the verbs in brackets. 1. I must (study)__________ for the test tomorrow, so I can’t go out with my friends tonight. Giáo Viên Chuyên Anh - Thầ y Bùi Văn Vinh - 0988.333.599 12 2. In my future house, there (be) _______________ a robot that can help me with household chores. 3. Earth (spin)_______________ on its axis once every 24-hour day. 4. Yesterday, she (not go)___________ to the gym because she was sick. 5. He always (make)______________ silly mistakes. III. Put the correct form of the words in brackets. 1. My father drives more ____________ than my brother. He rarely has accidents. (careful) 2. We expect her _____________ on Monday morning. (arrive) 3. She is so ______________ that she doesn’t want to ask for help. (depend) 4. If you make someone disappointed, you should _________________. (apology) 5. ______________, we arrived in time to take the last bus. (lucky) giúp mik

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team