I believe it would be compound.
Answer:

Explanation:
Given
31.8 moles of water
Required
Determine the number of molecule
In standard units: 1 molecule of water is:

Multiply both sides by 31.8



Express 191.4996 as a standard form

Apply law of indices:


Approximate:

Answer:
A photon
Explanation:
When electrons pass close to the standing wave of light, they hit the particles that are called photons
Explanation:
The viscosity of the liquid has been used to evaluate its resistance to flow. Air, gasoline, as well as other fluids that move quickly, are of low viscosity. The particles throughout the liquid are covered by other particles and drawn uniformly in both directions by cohesive forces inside the liquid.
Mixing equal amounts of a strong acid with a strong base also produces a neutral pH (pH = 7) solution<span>.
</span>A neutralization reaction<span> is when an acid and a base</span>react<span> to form water and a salt and involves the combination of H</span>+<span> ions and OH</span>-<span> ions to generate water. The </span>neutralization<span> of a strong acid and strong base has a pH equal to 7.</span>