1)NH4Cl+<span>NaOH= NaCl+NH3(стрелочка вверх)+H2O
2)</span><span>2NH3 + H2O2 = N2(стрелочка вверх) + 6H2O
3)</span><span>N2 + O2 = 2NO
</span>4)<span>2NO + O2 = 2NO2
</span>5)NO2+NaOH=NaNO3<span>+NaNO2+H2O
</span>
4................................................................
Fe2O3 + 2Al = Al2O3+2Fe
n(Fe)=5 моль
n(Fe2O3)= x/1=5/1
x=5
m=5*160=800г