thien030607 thien030607
  • 02-08-2021
  • Chemistry
contestada

cho 6,5 g Zn tác dụng với dung dịch chứa 12g HCl. Thể tích khí H2 ( ở đktc ) là

Respuesta :

nhinguyenthao62
nhinguyenthao62 nhinguyenthao62
  • 02-08-2021

Answer: nHCl = 12/36,5= 0,38(mol)

nZn = 6,5/65 = 0,1(mol)

Ta có pt: Zn + 2HCl --> ZnCl2 + H2

Vì 2n Zn = 0,2 < n HCl = 0,38 nên HCl dư

Theo PTHH :

n H2 = n Zn = 0,1(mol)

V H2 = 0,1.22,4 = 2,24(lít)

Explanation:

Answer Link

Otras preguntas

Which sentence contains an adjective clause? A. Jan saw a stranger's wallet lying on the ground. B. The man whose wallet Jan found gave her a reward. C. Last Tu
Positively charged sodium ions transport electrical impulses in the nervous system. Which subatomic particle does sodium lose to attain a positive charge?
Find all the powers of 4 in the range 4 through 1,000.
Which feature of the Roman Republic's government is also a feature of the United States' government? a Senate with 300 members appointed by the head of governme
Debbie cut a cord into sixths . She used five of the to make necklaces . She used equal lengths of the remaining cord for each of four bracelets. What fraction
Solve for X 3ax/5 - 4c = ax/5
Which of the following is a reason why the demand for salt was as high as gold at one time? Salt could be used as medicine. Salt was necessary to preserve meat.
Is the sentence a simple or a compound sentence The hat was dark green and had a wide brim A simple B Compound
round 0.4625 to the nearest cent
Look below for question: