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

what is 69/25 as a terminating decimal
Suppose that 2 scientists use different measurement systems in their work. What problems might arise if they shared their data?
Which best describes Germany’s standard invasion strategy at the beginning of World War II?a. Attack with a combination of speed and overwhelming forceb. Intimi
Write equation in function form 2x+2y=8 and 6x-3y=12
1/3(9x+27)-4=1/2(2x+54)
How does the saguaro cactus take advantage of rare, brief rainfall?
2h/3-1/4=1/3 solve and show your steps
What is the coefficient of x in the expression x-2? Explain your reasoning.
Which two countries were the first to declare war on Germany in WWII?
Which best describes Germany’s standard invasion strategy at the beginning of World War II?a. Attack with a combination of speed and overwhelming forceb. Intimi