Zn + 2HCl = ZnCl2 + H2
Zn(OH)2 (t)= ZnO + H2O
MgCO3 (t)= MgO + CO2
2H3PO4 + 3CaO = Ca3(PO4)2 + 3H2O
<span><span>4NH3</span> + 5O2 = <span>4NO</span> + 6H2O</span>
<span>
<span><span>ОВР :
</span></span></span>
<span><span><span><span><span><span>Восстановление:<span><span>
O + <u>2</u>e− = O2−
</span></span>
Окисление:<span><span>
N3− − <u>5</u>e− = N2+ </span></span></span></span><span><span><span><span /></span></span></span></span></span><span><u>
5</u>O + <u>2</u>N3− = <u>5</u>O2− + <u>2</u>N2+</span></span></span><span> </span>
1) 2Ag2O = 4Ag + O2
n (Ag2O) = 23,2 : (108*2+16) = 0,1 моль
n (O2) = 0,05 моль
2) 2 2 2 1
2 2 1
4 2 3
2 3