Question

Nowing are the combining powers of the constituting elements of the compounds shown in the table. Now
write down the formulae for these compounds:
Combining power: Na : 1, CI : 2, Fe : 2, Zn : 2, A1 : 3, O : 2, C1 : 1
1 Iron Oxide
2. Iron sulphide
3. Sodium oxide
4. Calcium oxide
5.Calcium sulphide
6. Zinc chloride
7. Zinc sulphide
8. Aluminium oxide
9.Aluminium chloride

please tell me fast​

Answer 1

Answer:

3 or 7 , 9 is the answer to this question