This has already been posted by Shilpa. I have also provided the details of the logic, and it involves simple math. If anyone has any queries in math or chemistry, feel free to ask anytime. Please go through the information provided.
Regards,
Servesh
If you are knowledgeable about any fact, resource or experience related to this topic - please add your views. For articles and copyrighted material please only cite the original source link. Each contribution will make this page a resource useful for everyone. Join To Contribute