16. Tính khối lượng kết tủa thu được khi: a. 0,4 mol ZnCl2 vào 400ml NaOH 1,5M. b. 0,25 mol AlCl3 vào 400ml dung dịch KOH 2M. c. Cho 0,35 mol ZnCl2 vào 400ml dung dịch KOH 3M. d. Cho 0,03 mol Al2(SO4)3 vào 100ml dung dịch Ba(OH)2 1M. e. Cho 0,15 mol ZnSO4 vào 200ml dung dịch Ba(OH)2 2,25M

Viết đoạn văn( dài nha tầm 1tr) nghị luận về che giấu khuyết điểm của bản thân sẽ không làm ta trở nên tốt đẹp hơn Giúp mik vs ạ !! Helppp ( sẽ vote 5* nha)

(3*căn bậc hai(5) + căn bậc hai(2)) * (3*căn bậc hai(5) - căn bậc hai(2))

Bài 3. Tính nhanh: a) A= 1.2 + 2.3+ 3.4 +…+ 100.101 b) B= 1.2.3 + 2.3.4 + 3.4.5 +…+ 100.101.102 Bài 4. Tính giá trị các biểu thức sau bằng cách hợp lý: a) A = 714 + 382 + 286 + 318 b) B = 35.34 +35.86 +65.75 +65.45 c) C = (257.139 – 257 .39) : 100 d) D = 102 – 96 + 90 - 84 +…+ 54 – 48 e) E = 3 + 5 + 7 + … + 2021 Bài 5. Tính nhanh: a) A= 1.2 + 2.3+ 3.4 +…+ 2020.2021 b) B= 1.2 + 2.3 + 3.4 +…+ n.(n + 1)

(căn bậc hai(2) + căn bậc hai(72) - căn bậc hai(18)) * căn bậc hai(2)

Giúp mk với nha mn mk ko biết làm

giúp tí đặt tiếp =)))))))) nhanh nhó

we should do our homework before go to bed. it's a good

làm giúp em câu c ở trên với vd2 ạ

Make the conditional clauses according to the facts provided: 1. He wasn’t able to answer the questions, so he failed the exam. ® If….......…………………………………………............................................... 2. I didn’t see you there, or I’d have said Hello. ® If….......……………………………………………………………… 3. The reason I haven’t been to Hawaii is that I can’t afford it. ® If….......………………………………………………..................................... 4. They won the games because two of our players were injured. ® If….......……………………………………………....................................................... 5. They are having a row because she borrowed his tennis racket and lost it. ® If….......……………………………… 6. I’m afraid of traveling by air, so I had to go to American by boat. ® If….......………………………………………........................................................... 7. She hasn’t studied English before. That’s why she’s in introductory class. ® If….......…………………………………………………………………………………………….. 8. One of the reasons I didn’t phone you was that I was very busy. ® If….......…………………………………………………………………………………………….. 9. Keep silent or you’ll wake the baby up. ® If…………………………………………… 10. Go right now or you’ll be late for the rain. ® If………………………… 11. As she is often absent from the class, she can’t keep pace with her classmates. ® Unless………………… 12. He had a flu because he ran out in the rain last night. ® If….......…….……………………………………………… 13. Be calm or you’ll make a wrong decision. ® If…........……………………………………………………………… 14. Without a visa, she couldn’t have come to this country. ® If….......………………………………………………………… 15. In the snowy weather we don’t go to school. ® If….......………………………………………………………………… 16. If the news turns out to be true, I’ll sell my shares at once. ® Should.……….………………………………………........................................... 17. If he fails the final examination, he won’t be able to graduate. ® Unless...…………………………………………............................................. 18. Provided that you leave an address we’ll be able to contact you. ® Unless...………………………………….………............................................................ 19. Without Jack’s help, I wouldn’t have been able to move the table. ® If….......………………………………………......................................................... 20. If you hadn’t told me about Sue’s hair, I wouldn’t have noticed. ® Unless...…………………………………………..................................................................... 21. The policeman showed me the way, so I found the house. ® If….......…………………………………………………................................................. 22. We stayed up all night, that’s why we’re so tired this morning. ® If….......…………………………………………...........................................................