Răspuns:
miu,NH3= 17g/mol
niu=m/miu= 3,4g/17mol=0,2molNH3
1mol.......................1mol
NH3 + HCl----> NH4Cl
0,2mol....................x=
niu,teoretic= 0,2mol NH4CL
niu,practic= 0,15mol
randament= niu practicx100/ niu teoretic= 0,15x100/0,2=75%
Explicație: