<span>Both are composed of two elements (that means binary).
Ionic is composed of two ions, metallic cation-positive ions, and nonmetallic anion - negative ions. For example NaCl (sodium-chloride).
Molecular compounds are composed of two nonmetallic elements. For example HCl (hydrochloric acid).</span>
We know,

For given reaction, 

For , 2.41 moles of
:

We know :

Hence, this is the required solution.
A. is the correct answer.