n(niu)= V/Vm
n=3,36l/22,4l/mol= 0,15mol H2S
1,5mol............................1,5mol
H2S +3/2O2----> H2O+SO2
1,5mol.....................1,5mol
SO2 + 2KOH-----> K2SO3 + H2O K2SO3-SULFIT DE POTASIU
m= n x M
M= (2X39gK+ 32gS+ 3X16gO0/mol=158g/mol
m= 0,15molx158g/mol=......................calculeaza !!!!