That is not correct, not even close. The estimated number of atoms in the observable universe (10^80) is 71 million trillion trilliontimes greater than 2^160.
Molecules?
Yes, because the average molecule contains more than 71 million trillion trillion atoms.
I think you're being sarcastic. What's the average for a molecule? 3?
More like 2.
minimum size of a molecule is 2 atoms; diatomic molecules. So it's definitely >2