NaOH+HCL=H2O+NaCl
m(HCL)=438 u
n(HCl)=12 моль
m(NaOH)=<u>480г</u>
<em>Fe + S = FeS <span>FeS+ H2O= H2S + FeO</span> O3 + H2S(газ) = SO2 + H2O </em>