1)Al+6HNO3=Al(NO3)3+3NO2+3H2O(конц.)
Al+4HNO3=Al(NO3)3+NO+2H2O(разб.)
8Al+30HNO3=8Al(NO3)3+3NH4NO3+9H2O(с.разб.)
2)
<span>NH3 + SO3 → NH2SO3H
или
NH3 + SO3 → HSO3NH2 <span>[12]
3)</span></span><span>H2S + 2KNO3= S+2NO2+H2O+K2O
4)</span><span><span>MgO</span> + <span>2 <span>HCl</span></span> → <span>MgCl2</span> + <span>H2<span>O</span></span></span>