I NEED HELP AND FAST WHOEVER IS CORRECT GETS BRAINIEST JUST PLEASE HELP Read each statement, and write in the blank the word or words that best completes the statement.
13. A molecule is the smallest unit of a substance that retains the of that substance.

14. The chemical symbol O stands for the element .

15. The chemical formula for a chlorine molecule, which contains two chlorine (Cl) atoms, is .

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

Light waves travel than sound waves.

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.