H2SO4+Mg(OH)2--> MgSO4+2H2O
2H+ + SO42- + Mg2+ + 2OH- ---> Mg2+ + SO42- + 2H2O
2H+ + 2OH- ---> 2H2O
Молекул-20,4748*10^23
Атомов-81,8992*10^23
2NaBr + Cl2 → 2NaCl +Br2
<span>2NaCl + F2→Cl₂ + 2NaF
</span>Cl2 + 2KI= I2 + 2KCl
I2+ H2S = S + 2HI
HI + AgNO3 = AgI + HNO3
<span><span>4<span>K</span></span>+<span>O2 = </span><span>2<span>K2<span>O
K2O+H2O=2KOH
KOH+HCl=KCl+H2O
</span></span></span></span>