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

Australian Plate and the Eurasian Plate boundary?
Explain how you know that the sum of 12.6,3.1,and 5.4 is greater than 20.
What was one major effect of industrialization on American society?
1. What was the Munich conference? Why did the French and British give into Hitler's demands?
11 more than twice a number x
7 - 3 = -x + 1 Solve for X.
An endemic disease is best described as a disease that __________. a. rarely affects a specific place or group of people b. is characteristic of a specific pl
what are 6 traits of a good scientific observer
Isaiah puts a 10 gram weight on a pan. how many 1 gram weight does he need to balance the scale
Which of the following best describes Daniel Webster’s views? a. .he disagreed with slavery but supported compromise b. he declared nullification a form of trea