Question

Определить валентность: N2O PH3 N2O5 H2S SO3 FeO Cr2O3 CH4 CO2 AlCl3

Answer 1

I     II
N2O
III   I
PH3
V   II
N2O5
I    II
H2S
VI  II
SO3
II    II
FeO
III    II
Cr2O3
IV I 
CH4
IV II 
CO2
III   I
 AlCl3

Answer 2

Valence of the Given Compounds

The valence of the given compounds is as follows:

1. N2O: The valence of N2O is 2.2. PH3: The valence of PH3 is 3.3. N2O5: The valence of N2O5 is 5.4. H2S: The valence of H2S is 2.5. SO3: The valence of SO3 is 3.6. FeO: The valence of FeO is 2.7. Cr2O3: The valence of Cr2O3 is 3.8. CH4: The valence of CH4 is 4.9. CO2: The valence of CO2 is 4.10. AlCl3: The valence of AlCl3 is 3. Please let me know if there's anything else I can help you with!