M(miu)=(14gN+4gH+35,5gCl)/mol= 53,5g/molNH4Cl
M= 35g/mol NH4OH
M= 111g/mol CaCl2
2mol.................................1mol.........2mol
2NH4Cl + Ca(OH)2----> CaCl2 + 2NH4OH
2x53,5g.................................111g........2x 35g
6,34g..................................x..........................y
calculeaza x si y !!!!!