Question

magnesium is completely burnt in air,it produces magnesium oxide. Calculate the mass of OXYGEN required in the process. [At wt : Mg=24, O=16]​

Answer 1

Answer: 160g

2Mg+O  

2

→2MgO

1 mole of O  

2

​

 is required for 2 Moles of Mg

5 Moles of O  

2

​

is required for 10 Moles of Mg

So , 32×5g of O  

2

​

 is required = 160 g