Question

2.2.5g Mg is burned with 1g of O2 in a closed vessel to form MgO.which is the excess reagent here?

Answer 1

Answer: if 2.25 g of Mg is burnt   with 1g of o2, then Mg is excess and O2 is limiting reagent .

Explanation:

Mg      +  O2        →   MgO

24 g      32 g            40 g

1g           32   g

           ---------

               24    

2.25g       32

              -----  ×2.25   g     =2.29  g    O 2  is required

               24