If molecular orbitals are created by combining five atomic orbitals from atom A and five atomic orbitals from atom B combine, how many molecular orbitals will result?

10 molecular orbitals

Explanation:

The number of atomic orbitals combined to form a molecule is the same number if molecular orbitals that will be found in the molecule. Hence, the number of orbitals are conserved. Some of these orbitals will be bonding molecular orbitals while others will be anti bonding molecular orbitals.