Identify the orbital having highest energy from following:

A metal crystallises in bcc structure with edge length $4 \times 10^{-8}$. If density of unit cell is $10 \mathrm{~g} \mathrm{~cm}^{-3}$. What is its molar mass?

Identify product 'B' in following reaction

How many molecules of carbon dioxide are formed when 0.6 g carbon is burnt in air?