<span>KI<span> + </span>H2SO4<span> = </span>K2SO4<span> + </span>I2<span> + </span>SO2<span> + </span>H2O<span> </span></span>
1) Se => V => As => Ca
2) B => Ti => Sc => Ga
Объяснение:
<em>M(Al(OH)3) = M(Al) + M(3O) + M(3H) = 27 + 3×16 + 3×1 = 78 (г/моль)</em>
<em>M(Al(OH)3) = M(Al) + M(3O) + M(3H) = 27 + 3×16 + 3×1 = 78 (г/моль)Доля элементов в Al(OH)3</em>
<em>Al : 35%</em>
<em>Al : 35%O : 62%</em>
<em>Al : 35%O : 62%H : 4%</em>
..................................................
Первое:
N2+3H2-->2NH3
Второе:
4NH3+5O2-->4NO+3H2O
Третье:
2NO+O2-->2NO2
Четвертое:
NO2+H2O+O2-->HNO3
Пятое:
HNO3+NH3-->NH4NO3
nice.