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

hey ok so i’m having trouble with my math test and i need help ASAP. someone please help me answer the following questions.
What is one purpose of alogorihm​
What else did Christopher Columbus introduce the region as an ideal place for?
Assume that y varies directly with x. If y = -5 when X = 12.5, find x when y=15. Enter in any fractions using a / (e.g. "1/2" is the same as 1/2
Simplify -22 + (-5) x6
How much energy (joules) is needed to heat 250 grams of copper from 22 °C to 99 °C? The specific heat capacity (C) of copper is 0.386 J/g°C.
Laura would like to see if she would be considered creditworthy. Explain in two to three sentences how she could find out.
31 days, 160 residents multiply it.
If adora watched a video that's 21:58 minutes long what time will she have to start watching to finish exactly at 11:59pm​
Why is realism said to be a reaction to romanticism?