Al + HNO3конц = не реагирует
Cu + HNO3конц = Cu(NO3)2 + 2NO2 + 2H2O
m(cu) = 64*4.48/ 44,8 = 6,4
m(Al) = 10-6.4 = 3.6
w(Cu) = 6,4/10 = 0.64 = 64%
<span>w(Al) = 3.6/10 = 0.36 = 36%</span>
2Mg+O2->2MgO
Fe2O3+3Mg->3MgO+2Fe
2CO + O₂ = 2CO₂
2SO₂ + O₂ = 2SO₃
2FeCl₃ + Fe = 3FeCl₂
2FeCl₂ + Cl₂ = 2FeCl₃