Question

cine ma ajuta .....am mare nevoie

Answer 1

a)

PV = nRT

=> n = PV/RT => n = 1,8x400/0,082x(273+400)

= 13 moli Cl2

V = niuxVm, Vm = volumul molar in c.n. = 22,4

=> V = 13x22,4 = 291,2 L

b)

13 moli   m g      n moli

Cl2    +    H2 => 2HCl

1               2        2

=> m =13x2/1 = 26 g H2

c)

n = 13x2/1 = 26 moli HCl

din legea lui Avogadro:

1 mol de HCl ..................... 6,022x10la23 molecule

26 moli HCl ..................... a molecule

=> a = 156,6x10la23 molecule HCl