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

if the population of insects decreases, which other population will decrease the most? a. badgers b. lizards c. sage brush d. squirrels​
Jay buys 60 square feet of tile for $324. Later, he buys another 20 square feet of tile. How much does the extra tile cost?​
Help me with this question please!! Show all work
what is the issues of the 1892 presidential election?
Which would be the most appropriate way to estimate -6.1(0.22)? Check all that apply. Use rounding to get -6(0.2), and then multiply. Use compatible numbers, su
resolve into partial fraction. (5x+2)/3x²+4x-4​
Who is the author "talking” to in the third stanza of Flanders field
What made Canada important in the War of 1812?
You pivot your feet as you punch.A. True B. False​
Use point-slope form to write the equation of a line that passes through the point (19,20) with slope 2/5