Answer :
The balanced chemical reaction is,

From this balanced chemical reaction, we conclude that
2 moles of iron oxide react with the 3 moles of carbon to give 4 moles of iron and 3 moles of carbon dioxide.
Therefore, the valid mole ratio from the balanced chemical reaction is,

Sulfur dioxide formula is : SO2
Hyrdrogen monobromide is : HBr
Hope this helped :)
The second level has s and p orbitals, the s orbital holds two electrons and all three p orbitals also hold two each for a total of eight electrons in the second energy level.
So what is the question about
i don't understand