ajutatima va rog 58 p.
![Ajutatima Va Rog 58 P class=](https://ro-static.z-dn.net/files/d49/0ea47328487039f4ea015c22a6b3c6cf.jpg)
a)Fe(OH)3; SO2; SO3
H3PO4; P2O5; Cl2O7
HCl; CO2; H2S
b)H2SO4; CaO
Al(OH)3; NO2
CH4; PH3