Câu 1:Cho 150 ml ZnCl2 1M tác dụng V(ml) Ba(OH)2 thu được 19,94 gam kết tủa.Tính V

Mn giúp em với ạ Làm phần b và c theo mẫu ạ Ai làm nhanh và đúng em cho ctrlhn luôn ạ

giúp mình vs ajk.Ai gửi đầu tiên mình cho câu trả lời hay nhất ajk(mình đang cần gấp nhesk )

THẦY CÔ GIÚP EM VS Ạ EM CẢM ƠN NHIỀU Ạ

91. I......... Peter today. A. not have seen B. do not see C. have not seen D. was not seen 92. She ..................music all day. Now she feels tired. A. has been playing B. is playing C. played D. plays 93. Last year they ..............22 million TV sets. A. were selling B. had sold C. has sold D. sold 94. I...........my son the money for the last week. A. gave B. given C. have given D. was given 95. I ............lots about the job so far. A. have learnt B. am learning C. had learnt D. learnt 96. At last the bus came. We.............for half an hour. A. waited B. was waiting C. have waited D. had been waiting 97. I ...........at the end of the month. A. will leave B. would leave C. would have left D. is leaving 98. Bad driving often..............many accidents. A. caused B. cause C. causes D. has caused 99. Look! The man .................to open the door of your car. A. try B. tried C. is trying D. has tried 100. The Olympic Games ...............every four years. A. takes place B. take place C. took place D. is taking place

would / where / like / you / work / to you / be / a would / footballer / to with / like / you / would / woulk / who / to at / corner / next / turn / right / the i / there / can / how / get taxi / take / you / a /can entrance / stop / the / is /of / the / at / bus / zoo / the would / like / what / you /eat / to? a / i'd an sadwich / apple , / please / and / like bottles / five / water / of / a / drink / day / i

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Ex1: Tìm và sửa lỗi sai trong các câu: 1. It's a secret. You needn't tell anyone about my plans. 2. It's a reasonable cheap restaurant, and the food is extremely well. 3. She went to bed lately because she had too much homework. 4. You don't have to be worried of anything. 5. I will stay at Vietnam for 2 years.

He last visited his grandpa last year. He hasn't .......................................

chứng minh rằng : (x+y)^2 + (x-y)^2 = 2(x^2 + y^2)