BaCI₂+ K₂SO₃ = BaSO₃↓<span>+2KCI
</span>Ba²⁺ + 2CI⁻+ 2K⁺ + SO₃²⁻ = BaSO₃↓+2K⁺ + CI⁻
Ba²⁺ + SO₃²⁻ = BaSO₃↓
2H20==>2H2+O2
n(h20)=27г/18=1.5 моль
n(o2)=1/2n(h20)=0.75
V(o2)=0.75*22,4=16,8 л
N2O Mr=(14*2+16*1)=44
H2SiO3 Mr=(1*2+28*1+16*3)=78
CuSO4 Mr=(64+32+16*4)=160
СН3-СН2-СН(Cl)-CH3 + KOH = (спирт, t°) СН3-СН2-СН=СН-СН3 + КCl + H2O