Question

E urgent, Dau coroană​

Answer 1

Răspuns:

1mol......2moli...................1mol

Zn   +    2HCl → ZnCl2 +H2↑

xmoli.....ymoli..................2,5moli

x=2,5×1/1=2,5moli Zn

y=2,5×2/1= 5moli HCl

65g.......2×36,5.................2g

Zn   +    2HCl → ZnCl2 +H2↑

zg.............tg.....................5g

MZn=65g/mol

MHCl=1+35,5=36,5g/mol

MH2=2×1=2g/mol

n=m/M

m=n×M=2,5×2= 5g

z=5×65/2=162,5gZn

t=5×2×36,5/2=182,5g HCl

Explicație: