a) б) в)
2Cu+O2= 2CuO
CuO+H2SO4=CuSO4+H2O
CuSO4+2NaOH=Cu(OH)2+Na2SO4
Cu(OH)2=CuO+H2O
CuO+H2=Cu+H2O
4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+3CaO=Ca3(PO4)2+3H2O
4Li+O2=2Li2O
Li2O+H2O=2LiOH
2LiOH+H2SO4=Li2SO4+2H2O
a)
![2Cu + O2 ---- 2CuO](/tpl/images/0125/4214/dd440.png)
![CuO + SO3 ---- CuSO4](/tpl/images/0125/4214/4a2ca.png)
![2CuO ---- 2Cu + O2](/tpl/images/0125/4214/7f626.png)
![4P + 5O2 ---- P2O5](/tpl/images/0125/4214/7327c.png)
![2H3PO4 + 6Ca ----- 2Ca3PO4 + 3H2](/tpl/images/0125/4214/877e5.png)
![2Li + O2 --- Li2O](/tpl/images/0125/4214/00223.png)
![Li2O + H2O ---- 2LiOH](/tpl/images/0125/4214/219d7.png)
![2LiOH + H2SO4 --- Li2SO4 + 2H2O](/tpl/images/0125/4214/08a56.png)
б)
в)
2Cu+O2= 2CuO
CuO+H2SO4=CuSO4+H2O
CuSO4+2NaOH=Cu(OH)2+Na2SO4
Cu(OH)2=CuO+H2O
CuO+H2=Cu+H2O
4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
2H3PO4+3CaO=Ca3(PO4)2+3H2O
4Li+O2=2Li2O
Li2O+H2O=2LiOH
2LiOH+H2SO4=Li2SO4+2H2O