Question

Va rog am nevoie de ajutor
Dau coroana
Pls repede​

Answer 1

Răspuns:

p=m,px100/m,i---> m,p= 250x90/100g=225gAl PUR

2mol........6mol.......................3mol         sau, in grame

2Al    +    6HCl----> 2AlCl3 + 3H2

2x27g....6x36,5g .................3mol

225g...............x......................y

x=m=912,5g HCl

c= mdx100/ms,    unde md= 912,5g HCl    c= 36,5%

ms= 912,5x100/36,5g=2500g solutie

y= 12,5 mol H2

Explicație: