Đáp án:
Giải thích các bước giải:
$Ba(OH)_2 → Ba^{2+} + 2OH^-$
$NH_4^+ + OH^- → NH_3 + H_2O$$Fe^{3+} + 3OH^- → Fe(OH)_3$
$Ba^{2+} + SO_4^{2-} → BaSO_4$
Ba(OH)2→Ba2++2OH−Ba(OH)2→Ba2++2OH−
NH+4+OH−→NH3+H2ONH4++OH−→NH3+H2OFe3++3OH−→Fe(OH)3Fe3++3OH−→Fe(OH)3
Ba2++SO2−4→BaSO
Bị động ở quá khứ đơn 1. They cancelled all the flights because of fog. All the flights ……………………………………………….. 2. People advised us not to go out alone. We ……………………………………………… 3. The girl did not give me the money. I …………………………………………………… The money …………………………………………… 4. A man asked me several difficult questions at the interview. I ……………………………………………………….. 5. Nobody told me the story. I ……………………………………………. The story …………………………………………. 6. People used oil-lamps thousands years ago. Oil-lamps………………………………………… 7. When did they open that hospital? When ……………………………………………… 8. Did anyone see you come in? Were you ……………………………………………? 9. Somebody broke into my house yesterday My house…………………………………………. 10. Shakespeare wrote many famous plays. Many famous plays ………………………………. III. Bị động ở thì hiện tại hoàn thành 1. They have built this school for 2 years. …………………………………………………… 2. Phu Quang has composed a lot of songs about Ha Noi …………………………………………………… 3. He hasn’t finished his homework yet. …………………………………………………… 4. Nam has studied English for 5 years. ……………………………………………………… 5. Tim has played soccer since he was ten. ……………………………………………………… 6. How long have you studied French? …………………………………………………… 7. Have you watched this film before? …………………………………………………… 8. They have decorated this room for hours. …………………………………………………… 9. They have added beautiful patterns on the Ao dai. ……………………………………………………… 10. They have finished the report. …………………………………………………… IV. Bị động ở thì quá khứ tiếp diễn 1. Nam was watching an action film at 8.00 last night …………………………………………………………………. 2. Lan was reading a new comic at this time yesterday. …………………………………………………………………. 3. Hoa wasn’t cooking dinner last night. …………………………………………………………………. 4. What were you doing yesterday? …………………………………………………………………. 5. Were they cleaning the room at 6 yesterday? …………………………………………………………………. V. Bị động với động từ khuyết thiếu 1. Nam can fix the bike well. …………………………………………………………………. 2. She is going to read a new novel tomorrow. …………………………………………………………………. 3. You must do your homework regularly. …………………………………………………………………. 4. He used to write poems when he was young. …………………………………………………………………. 5. John ought to wash his clothes every day …………………………………………………………………. 6. They are going to plant trees along the sidewalk. …………………………………………………………………. 7. No student can solve this problem. ……………………………………………………………... Giúp mk vs các bạn mk đag cần gấp
viết một đoạn văn bằng tiếng anh về chủ đề "what should we do to help the community" KHÔNG CHÉP MẠNG!
Cho P= Aa BD/bd Ee tự thụ phấn, các gen trội lấn át hoàn toàn các gen lặn. P tự thụ phấn được một thế hệ 1.1 Số loại giao tử 1.2 Số loại kiểu gen ở F1 1.3 Số loại kiểu hình ở F1 1.4 Tỷ lệ thuần chủng ở F1 1.5 Tỷ lệ kiểu hình mang 1 tính trạng trội 1.6 Tỷ lệ kiểu hình giống P ở F1 1.7 Tỷ lệ biến dị tổ hợp so với P
1. Cosx+3cos×x/2+2=0 2. 2tanx+3cotx=4
Ánh sáng đèn pin chiếu sáng như thế nào ?
Giải hộ mình nhanh với gấp lắm 😊😊😊
Hãy nêu ra công thức tính:1+2+3+4+...+100
IV. Supply the correct verb form: Present tenses. 1. Listen! I (think) someone (knock) at the door. 2. Up to the present, we (write) almost every lesson in the book. 3. The Earth (circle) the Sun once every 365 days. 4. The farmers (work) in the field at the moment. 5. How many times you (see) him since he went to Edinburgh? 6. Rivers usually (flow) to the sea. 7. Look! The boy (cry). 8. Do you know that man, who (smoke) there? 9. Mrs Green always (go) to work by bus. 10. We (be) from French. We (be) there for twenty years. 11. That house (belong) to Mr. Green. 12. Mai (lose) her dictionary. 13. I (be) sorry. I (forget) that girl's name already. 14. I (wait) for the manager for two hours. 15. You (ever, see) a lion? V. Supply the correct verb form: Simple past or Present perfect. 1. I (see) her before. 2. I (see) her last year. 3. Tom never (be) in Hanoi. 4. I (read) the novel written by Jack London several times before. 5. What you (do) yesterday? 6. You (watch) TV last night? 7. She (be) born in 1980. 8. He (write) a book since last year. 9. Mr Green. (teach) English in this school since he (graduate) from the university in 1986. 10. How long you (learn) English?
Vẽ hộ tui anime nam ngầu lạnh lùng Có màu ;ưu tiên kiểu tổng tài nhe ! Cảm ơn nhìu
các bạn giải nhanh giúp mình nhé , mình cảm ơn , mình cần gấp
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