Use atoms and molecules in a sentence

A molecule of water is made up of two atoms of hygrogen and one atom of oxygen. Explanation:

An atom is the smallest part of an element by itself, while molecules are built of multiple atoms.

the device is called “ rocket engine”

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2