Molecular orbital theory states that the number of molecular orbitals is equal to the number of atomic orbitals that overlap. The lowest energy molecular orbital is formed when two atomic orbitals that are in phase overlap, forming a bonding molecular orbital. However, another molecular orbital is also formed, called an anti-binding orbital.
So if an "n" quantity of atomic orbitals is combined, an "n" quantity of molecular orbitals is formed.
I think 80% sure that the answer is "<span>(64.1 g KCl) / (74.5513 g KCl/mol) x (3 mol O2 / 2 mol KCl) x (31.99886 g O2/mol) = 41.3 g O2" if it's wrong I am really sorry but if it's right glad to help have a great day!!!