Question

In reactie a fost luat 30g zinc calculati volumul ,masa ,si cantitatea de substanta de hidrogen obtinut in urma reactiei :Z+2HCL+H2

Answer 1

Răspuns:

A,Zn=  65g/mol

A,H2= 2g/mol

Vm= 22,4l/mol...volum molar

Explicație:

ecuatia reactiei chimice

1mol....................................1mol          sau, in grame

Zn + 2HCl----> ZnCl2 + H2

65g.......................................2g

30g.......................................x=m=0,92gH2

niu,mol= m/M= 0,92g/2g/mol=0,46molH2

V= niuxVm= 0,46molx22,4l/mol=10.3 l H2