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 idea is typically associated with the word "spade”? leisure time city life writing poems hard work
Balance the following chemical reaction equation: FeS + _02_Fe2O3 + ___SO2
How did the behavior of Americans in the 1920’s (Roaring 20’s) lead to the eventual Great Depression of the 1930’s.
pls help with this maths question... feels like I'm missing something easy ;/​
Why is standard time considered necessary ?​
what is the cube root of 27/64?​
4) The black square is a dilation of the blue square. What is the scale factor of the dilation? A) 1/4 B) 1/3 C) 3 D) 4
Which describes the political status of Antarctica? O A. colony of Argentina • B. A totalitarian regime • C. A scientific preserve owned by no one D. A militar
The circumference of a globe is 16pi inches. what is the volume of the globe? show your work. use 3.14 for pi ​
Can someone please help!