The phrase "a collection of molecules" is correct and usable in written English.
It can be used in scientific contexts, particularly in chemistry or biology, to describe a group of molecules that are gathered together.
Example: "In this experiment, we will analyze a collection of molecules to determine their interactions and properties."
Alternatives: "a group of molecules" or "an assembly of molecules".
That is: are humans "nothing but" a collection of molecules, nothing but a set of survival machines for their genes?
"Well, I think, I've always thought, maybe squirrels are in tune with the whole world in such a way that they see themselves as a collection of molecules.
For a collection of molecules that are in a particular MO or electronic state, there will be a distribution among the accessible vibrational and rotational states.
To help remedy what he sees as science's stripped-down view of life, Dr. Kass refers in his writings to the soul, a word he uses in a nontheological sense to mean that a living organism, even a bacterium, is not just a collection of molecules but a thing with needs, awareness, desires and goal-directed activities.
For a collection of molecules they will be spread out into a large number of rotational and vibrational energy states so any electronic state change (electronic transition) will be accompanied by changes in both rotational and vibrational energies in accordance with the proper selection rules.
We illustrate the tool by examining a diverse set of structural changes within a collection of molecules active against the HIV Integrase enzyme.
When a collection of identical molecules partially covers the surface, the dipole dipole interactions, along with other thermodynamic forces, drive the molecules to aggregate into monolayer islands, in the shape of dots or stripes.
Similarly, Poron foam is a collection of fluid molecules — until it is struck.
The hydrocarbon fraction of natural rubber (roughly 98 percent) is made up of a collection of polymer molecules, each of which contains approximately 20,000 C5H8 structural units joined together in a regular repeating pattern.
A reasonable paraphrase of the standard formulation would be "Water is a collection of H2O molecules".
Like many other substances, water's microstructure cannot simply be described as a collection of individual molecules.
