giải thích các bước lm hộ e vs ạ .Hoà tan 2,8 gam kim loại sắt với 50ml dung dịch HCl (D = 1,18g/ml) thì vừa đủ. Nồng độ C% các chất sau phản ứng. A) 10,275% B) 14,1% C) 10,29% D) 10,29% FeCl2 và 0,162% H2

Giúp em với mn em hứa sẽ cho hay nhất ạ

Chỉ dùng 1 thuốc thử, trình bày pphh nhận biết 3 chất rắn h2sio3, naoh, mg(oh)2

Trình bày suy nghĩ của em về trách nhiệm của bản thân trong việc giữ gìn và bảo vệ biển đảo quê hương Giúp mik gấp nhaaa

Exercise 7. Put the verb into the correct form of simple future tense. 1. When we get home, we ___________ (have) dinner. 2. I know they ___________ (feel) very happy if they win the match. 3. They’ve already decided on their next summer holiday. They ____________ (do) a tour of Norway. 4. She thinks that the Take That concert __________ (be) really exciting. 5. “What are your plans for this evening?” I ________ (meet) my friends and then go to a birthday party. 6. If you revise for the exam , I’m sure you ________ (get) a good result. 7. The weather forecast is good for the next few days. It _________ (be) very sunny. 8. I can’t come on the march tomorrow. I ___________ (look after) my cousins. 9. In the future, I think humans ___________ (wipe out) many different species. 10. He is buying some butter and eggs because he _________ (make) a cake later. Exer

Một người chạy được 400m trong 1 phút 20 giây. Vậy vận tốc chạy của con người đó là bao nhiêu m/giây? *

Vẽ cali: " Sự thật gần như đã được phơi bày" NL: bình luận nhé :D

Chuyển sang bị động : 1. Can you see Lan use my pen? …………………………………………………………………… 2. It is easy for him to study Mathematic. …………………………………………………………………… 3. Is it dangerous for them to cut off the trees? …………………………………………………………………… 4. It can be useful for you to use English fluently. …………………………………………………………………… 5. You need to have your hair cut ……………………………………………………………… 6. He doesn’t need to keep his bag all the time. ………………………………………………………………… 7. Do you need to open the windows?. …………………………………………………………………… 8. He wants someone to solve this problem. …………………………………………………………………… 9. I want you to remember these difficult cases. ……………………………………………………………………

Chọn đáp án đúng 1. I’m afraid of dogs/the dogs. 2. Can you pass the salt/salt, please? 3. Apples/the apples are good for you. 4. Look at apples/the apples on that tree! They are very big. 5. Women/the women live longer than men/the men. 6. I don’t drink tea/the tea. I don’t like it. 7. We had a very nice meal. Vegetables/ the vegetables were especially good. 8. Life/the life is strange sometimes. Some very strange things happen. 9. I like skiing/the skiing. But I’m not good at it. 10. Who are people/the people in this photograph? giúp mình với hứa vote 5 sao

Tìm m để hàm số y=-$x^{2}$ +2(m-1)x+3 nghịch biến trên (1, + ∞ )