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

Anyone have any song suggestions??
Please help. Is algebra.
Solve for x. Round to the nearest tenth
There are 396 students who are enrolled in an introductory biology course. If there are five boys to every four girls, how many boys are in the course?
Is there a simple machine that can be used for all purposes?​
4 + 2x − x = −3x − 4 what is the value of x?
the invention allowed stephen to select woedss on a computer screen find non finite verbs
1.5 Discuss the negative effects of conflict avoidance in dealing with conflict amongfamily members.(2x2) (4)​
Which equation represents a line which is parallel to the line 8x + 7y = -28?
Martha is writing a report on the landfill gases near her house. Fill in the blanks to complete her report