Hòa tan hết x gam kim loại R cần dùng 136 gam dung dịch 31,5%. Sau khi kết thúc phản ứng chỉ thu được dung dịch A và 0,12 mol khí NO. Cô cạn dung dịch A thu được (2,5x + 8,49) gam muối khan. Kim loại R là         

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:

  strengthen                         throughout                          clothing                       think

• Choose the word that has the underlined part pronounced differently from the rest:

  firing                        confirm                          require                       desire

• Find a mistake in the four underlined parts of the sentence and correct it:

  That's the man who daughter is studying with me.

• Choose a word that has different stress pattern:

  television                     document                     variety                     beautiful

• Choose a word that has different stress pattern:

  constantly                       investment                         document                         basketball

• Find a mistake in the four underlined parts of the sentence and correct it:

  There would be a lecture by Mr. Brown next week.

• Find a mistake in the four underlined parts of the sentence and correct it:

  We've run out of cooking oil. I'll going to get some.

• Choose the word that has the underlined part pronounced differently from the rest:

  through                        house                         bound                            announce

• Find a mistake in the four underlined parts of the sentence and correct it:

  How did you manage getting here so quickly?

• Find a mistake in the four underlined parts of the sentence and correct it:

  Most my classmates want to have a holiday in Nha Trang.