em dang can gaappppppp lam Giup em voi

Cho 114 gam dd H2SO4 20% vào 400 gam dd BaCl2 5,2%. a)Tính khối lượng kết tủa tạo thành b)Tính C% của những chất có trong dd sau phản ứng

Trộn 150gam dd NaOH 10% vào 460 gam dd NaOH 3% để tạo thành dd mới. a)Tính C% dd thu được b)Tính nồng độ m ol dd thu được biết thể tích sau khi trộn là 2l

Ai giúp với trl đúng + giải thik rõ ràng cho hay nhất + 5* cx như cảm ơn =)

ƯC(36;60;42) tìm ước chung BC(10;12;15)tìm bội chung

I/ Viết lại câu 50. He is a slower and more careful driver than I am - He drives ............................................................ 51. The visitor spoke so quickly that I couldn’t understand what he said - The visitor spoke too ............................................ 52. Jane found driving on the left difficult - Jane wasn’t used .................................................. 55. Can she take care of herself when her mother is away? - Can she look .......................................................? 58. We took a train to HCM city - We got to ............................................................ 59. It’ll be not necessary for you to go to the meeting next week - You won’t have ................................................... 60. How long was your flight from Ha Noi to Jakarta? - How long did ......................................................?

Q: Cho tam giác ABC. Điểm D,E thuộc cạnh AB sao cho AD=DE=EB. Vẽ DG và EF song song BC. a) Chứng minh AG=GF=FC b) Cho DG=5cm. Tính BC (Sử dụng đường trung bình của tam giác) Mn ơi, giúp mik với,mik đang cần gấp ạ Làm ơn

I. Write complete sentences using the cues given. 1. Elizabeth / enjoy / listen to / Vietnamese folf song's melodies ______________________________________________________________ 2. He / need / buy / some tools / fix / dog house / this weekend ______________________________________________________________ 3. Play / online game / have / both / positive / negative effects ______________________________________________________________ 4. Calvin / like / read / books, / and / he / not / often / surf / lnternet. ___________________________________________________________________ 5. Why / not / you / turn off / TV / go out / some fresh air ? _____________________________________________________________ 6. Hobbies / such as / play / sports / or / do / exercise / be / good _________________________________________________________________ 7. l / not / mind / do / homeword, / but / l / not / like / have / lots of it. ______________________________________________________________________ 8. Make / crafts / help / me / improve / my patience / carefulness. ___________________________________________________________________

In order …………….. with bird flu, Ba suggested that chicken shouldn’t ………….. (avoid / infect/ eat)

giải nhanh giúp mình câu này với ạ mình cần gấp cảm ơn nhiều ạ