A chunk of zinc reacts with hydrochloric acid. If the chunk of zinc was turned into powdered zinc, what would happen to the reaction.

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.

Which characteristics can be used to differentiate star systems? check all that apply.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.