Nhiệt phân muối Cu(XY3)2 hoặc muối AgXY3 đều thu đc khí A sau sơ đồ phản ứng sau: Cu(XY3)2->CuY+XY2+Y2 / AgXY3->Ag+XY2+Y2 Nhiệt phân a gam Cu(XY3)2 thu đc V1 lít hh khí, b gam AgXY3 thu đc V2=1,2V1 lít hh khí a. Viết PTHH, xác định tỉ lệ a/b biết phản ứng xảy ra hoàn toàn cung đk nhiệt độ và áp suất b. Tính V1 và V2 ở đktc nếu a=56,4g

Trong các badơ sau, badơ nào bị nhiệt phân hủy A.KOH B.Ba(OH)2 C.Al(OH)3 D.cả A&B

Văn chương gây cho ta những tình cảm ta không có, luyện những tình cảm ta sẵn có, cuộc đời phù phiếm và chật hẹp của cá nhân vì văn chương mà trở nên thâm trầm và rộng rãi đến trăm nghìn lần. Phương thức biểu đạt chính của đoạn văn đó là gì ? Tìm từ láy trong đoạn văn trên

Cho 5,6 gam hỗn hợp X gồm C và S tác dụng vừa đủ với 0,2 mol hỗn hợp khí Y (có tỉ khối hơi so với hidro là 20) gồm O2 và O3 thu được CO2 và SO2. Mặt khác, đốt cháy 3,36 gam X trong O2 dư rồi hấp thụ toàn bộ sản phẩm vào dung dịch Z chứa 0,15 mol NaOH và 0,05 mol KOH, thu được dung dịch chứa m gam chất tan. Biết các phản ứng xảy ra hoàn toàn. Giá trị của m là ?

Làm gì khi bố mẹ ko hiểu con cái và hiểu nhầm con

Nung trong bình kín 11, 2 lít (đktc) hỗn hợp khí X gồm SO2 và O2 (xt V2O5, dX/H2 = 22,4) thu được hỗn hợp Y. Cho Y tác dụng hết với dung dịch Ba(OH)2 dư thấy có 44,2 gam kết tủa. Hiệu suất của phản ứng oxi hóa SO2 là

giúp mk vs cần gấp lắm hứa tặng 5 sao Choose the letter A, B, C or D to complete the sentences with given words 1: Although/ fairy tales/ may/ imaginary, many/ kids/ love/ hear. A. Although fairy tales may imaginary, many kids love to hear them. B. Although fairy tales may imaginary, many kids love hear. C. Although fairy tales may be imaginary, many kids love to hear them. D. Although fairy tales may be imaginary, many kids love hear. 2: What/ be/ you/ and/ your friend/ do/ at 11 a.m. yesterday? A. What was you and your friend doing at 11 a.m. yesterday? B. What was you and your friend do at 11 a.m. yesterday? C. What were you and your friend do at 11 a.m. yesterday? D. What were you and your friend doing at 11 a.m. yesterday? 3: This book/ so/ interesting/ that/ I/ can’t/ put/ down. A. This book is so interesting that I can’t put it down. B. This book is so interesting that I can’t put down. C. This book so interesting that I can’t put it down. D. This book so interesting that I can’t put down. 4: I/ read/ this/ story/ about/ five/ times/ so far. A. I read this story five times so far. B. I have read this story five times so far. C. I had read this story five times so far. D. I am reading this story five times so far. 5: Most/ fairy tales/ end/ with/ happy/ wedding/ between/ the/ prince/ princess. A. Most fairy tales will end with a happy wedding between the prince and princess. B. Most fairy tales end with a happy wedding between the prince and princess. C. Most fairy tales ending with a happy wedding between the prince and princess. D. Most fairy tales ended with a happy wedding between the prince and princess. 2Rearrange the sentences to make meaningful sentences 6: cake/ Lang Lieu/ was/ Chung/ Day/ to/ the/ first/ cake/ one/ make A. Lang Lieu was the first one to make Chung cake and Day cake. B. Lang Lieu was the first make one to Chung cake and Day cake. C. Lang Lieu was the one cake and to first make Chung Day cake. D. Lang Lieu was first one to make the Chung cake and Day cake. 7. Vietnamese/ found/ watermelon/ think/ a/ that/ prince/ Mai An Tiem/ named. A. Vietnamese found that a prince named Mai An Tiem think watermelon. B. Vietnamese think that prince a named Mai An Tiem found watermelon. C. Vietnamese think watermelon that a prince named Mai An Tiem found. D. Vietnamese think that a prince named Mai An Tiem found watermelon. 8: I/ story/ will/ that/ meaningful/ never/ forget. A. I never will forget that meaningful story. B. I will never that forget meaningful story. C. I will never forget that meaningful story. D. I will forget never that meaningful story. 9: I/ believe/ in/ don’t/ ghost/ stories. A. I don’t believe in ghost stories. B. I don’t in believe ghost stories. C. I don’t believe ghost in stories. D. I believe don’t in ghost stories. 10: What/ the/ story/ most/ is/ for/ exciting/ you? A. What is exciting the most story for you? B. What is story the most exciting for you? C. What is the most exciting story for you? D. What is the for you most exciting story? Rewrite sentences without changing the meaning 11: I will never read this one again. A. This is the last time I read this one. B. This is the first time I read this one. C. This is the last time I have read this one. D. This is the first time I have read this one. 12: She was doing the washing when I stepped into the room. A. While I came, she was doing the washing. B. When I came, she was doing the washing. C. What I came, she was doing the washing. D. With I came, she was doing the washing. 13: How about listening to a bedtime story? A. What about listening to a bedtime story? B. Why about listening to a bedtime story? C. Who about listening to a bedtime story? D. When about listening to a bedtime story? 14: In fairy tales, the good will be helped by God. A. In fairy tales, God will be helped the good. B. In fairy tales, God will helped the good. C. In fairy tales, God will help the good. D. In fairy tales, God will be helping the good. 15: I am not good at math, or else, I can become a math teacher. A. If I were good at math, I could become a math teacher. B. Unless I were good at math, I could become a math teacher. C. As I were good at math, I could become a math teacher. D. Whether I were good at math, I could become a math teacher.

Hấp thụ hết V lít (đktc) khí SO2 vào 200 ml dung dịch NaOH 1M, phản ứng xong thu được dung dịch X. Tiến hành các thí nghiệm sau + Thí nghiệm 1: Cho 100 ml dung dịch X tác dụng với BaCl2 dư thì có 5,425 gam kết tủa. + Thí nghiệm 2: Cho 100 ml dung dịch X tác dụng với Ca(OH)2 dư thì có 12 gam kết tủa. Giá trị V là

Một vật có khối lượng 2,5 kg thì trọng lượng của nó là: A: 2500N B: 25N C: 250 N D: 2,5N

Giúp e với