Răspuns:
miu,NaCl= 58,5g/mol
niu=m/miu=11,7/58,5mol=0,2mol
2MOL.................................................2mol
2NaCl + H2SO4---> Na2SO4 + 2HCl
0,2mol.............................................x
x=niu=0,2mol HCl
2mol.....................1mol
2HCl + Zn ----> ZnCl2+ H2
0,2mol.................x
x= niu= 0,1mol ZnCl2
m=niuxmiu= 0,1(65+71)g=13,6g
Explicație: