How far can a cough travel?

How can you use chemical equations to predict the products of the reaction you can carry out?

When a septic tank backs up a goes in to clean it out

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.