<span>a) 4NH3+7O2=4NO2+6H2O</span>
<span>N+3 -1e- => N+4 1</span>
<span>O2 +2*2e- => 2O2- 4</span>
<span><span>b)2Al+3i2=2Ali3</span></span>
<span><span>Al -3e- => Al3+ 2</span></span>
i2 +2*1e- => 2i- 3
<span> c)5HNO3+3P+2H2O=3H3PO4+5NO </span>
N+5 +3e- => N+2 5
P -5e- => P+5 3
<span>d)<span>2</span><em>K</em><em>Mn</em><em>O</em>4<span> + </span><span>16</span><em>H</em><em>Cl</em><span> = </span><span>5</span><em>Cl</em>2<span> + </span><span>2</span><em>K</em><em>Cl</em><span> + </span><span>2</span><em>Mn</em><em>Cl</em>2<span> + </span><span>8</span><em>H</em>2<em>O</em></span>
<em>Mn+7 +5e- =>Mn+2 2</em>
<em>2Cl- -1*2e- =>Cl2 5</em>
2)Формула кальцій карбонату:<span>
B)Ca Co 3
</span>
<span>А)Гидроксидом меди 2 и азотной кислотой
Cu(OH)2↓ + 2HNO3 = Cu(NO3)2 + 2H2O
Б)Хлоридом железа 3 и гидроксидом калия;
FeCl3 + 3KOH = Fe(OH)3↓ + 3KCl
В)Серной кислотой и хлоридом бария.
H2SO4 + BaCl2 = BaSO4↓ + 2HCl
</span>