Kinsley

đốt cháy hết 0,27 mol hỗn hợp khí E gồm amin X; amin Y bậc 3 (x,y đều no đơn chức mạch hở) cần dùng 0,9675mol khí oxi nếu cho 0,27 mol hỗn hợp E tác d

Bởi

đốt cháy hết 0,27 mol hỗn hợp khí E gồm amin X; amin Y bậc 3 (x,y đều no đơn chức mạch hở) cần dùng 0,9675mol khí oxi nếu cho 0,27 mol hỗn hợp E tác dụng hết với hcl thu được m g muối. giá trị m?

21. I haven’t been to a Chinese restaurant for ages.  It’s age _________________________________________________________________ 22. The last time Na

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21. I haven’t been to a Chinese restaurant for ages.  It’s age _________________________________________________________________ 22. The last time Nancy came here was in 1986.  Nancy hasn’t ____________________________________________________________ 23. It’s a long time since our last conversation.  We ____________________________________________________________________ 24. “I think you should go by train.” He told us.  He advised ______________________________________________________________ … Đọc tiếp

11. Mai was my………. neighbor in Bac Ninh city A. close-window B. near-gate C. next-door D. by-house 12. When Hung was seven, he had to stay at home to

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11. Mai was my………. neighbor in Bac Ninh city A. close-window B. near-gate C. next-door D. by-house 12. When Hung was seven, he had to stay at home to ………. his younger sister. A. take after B. look after C. look up D. take care 13. You should try to learn the new words by … Đọc tiếp