В соединении Ca(OH)2
Ca= +2
O= -2
H= +1
в соединении NO2
N= +4
O= -2
в соединении BaSO4
Ba= +2
S= +6
O= -2
Правило: в соединение всегда
O= -2
H= +1
F= +1
свободные элементы = 0
сумма степеней окисления(зарядов) всегда должна ровняться 0
40/20=2 моль
2*22,4=44,8 литров
2*6,02*(10^23)=12,04*(10^23) атомов газа
<span>фосфор <span>1s</span></span>² <span><span>2s</span></span>²<span><span> 2p</span></span>⁶<span><span> 3s</span></span>²<span><span> 3p</span></span>³<span><span><span>
</span></span></span><span>фтор <span>1s</span></span>² <span><span>2s</span></span>² <span><span>2p</span></span>⁵<span><span><span>
</span></span></span><span>аргон <span>1s</span></span>²<span><span> 2s</span></span>²<span><span> 2p</span></span>⁶<span><span> 3s</span></span>²<span><span> 3p</span></span>⁶<span><span><span>
</span></span></span><span>алюминий <span>1s</span></span>²<span><span> 2s</span></span>²<span><span> 2p</span></span>⁶<span><span> 3s</span></span>²<span><span> 3p</span></span>¹<span><span><span>
</span></span></span><span>сера <span>1s</span></span>²<span><span> 2s</span></span>²<span><span> 2p</span></span>⁶<span><span> 3s</span></span>²<span><span> 3p</span></span>⁴<span><span><span>
</span></span></span><span>калий <span>1s</span></span>²<span><span> 2s</span></span>²<span><span> 2p</span></span>⁶<span><span> 3s</span></span>²<span><span> 3p</span></span>⁶ <span><span>4s</span></span>¹
ZnCl2+2NaOH=Zn(OH)2+2NaCl
Cu(OH)2=CuO+H2O
CaO+H2O=Ca(OH)2
4Li+O2=2Li2O<span>
FeO+H2SO4=FeSO4+H2O</span>
