Cho 3,23 gam hỗn hợp muối NaX, NaY (X, Y là 2 halogen ở 2 chu kỳ liên tiếp, MX < MY) vào dung dịch AgNO₃ dư thu được 6,63 gam hỗn hợp kết tủa. Thành phần % khối lượng NaY trong hỗn hợp ban đầu là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  circle                 culture               foreign               around

• Choose the best answer for the following sentence:

  Bruce Lee’s influence has ____________ beyond the TV viewing audience.
   

• Choose the best answer for the following sentence:

  ___________ is a film made using characters and images which are drawn rather than real, and which is usually amusing.
  
  

• Choose the best answer for the following sentence:

  Do you know where the _____________ director of the theatre is?
   

• Choose the best answer for the following sentence:

  At last she could not succeeded ___________ acting, which made the director very angry.
   

• Choose the best answer for the following sentence:

  The play is ___________. We are all ____________ to see it.
   

• Choose the best answer for the following sentence:

  The problem of violence on screen is ____________, so many people who are ____________ with it are very ___________. 
   

• Choose the best answer for the following sentence:

  The director is ___________ English but his wife is ____________ Swede.
  
  

• Choose the best answer for the following sentence:

  I am bored up with watching ___________ films all ____________ time.
   

• Choose the best answer for the following sentence:

  It is __________ films that help us widen our knowledge of cultures, coun-tries, and people.