Select all sets in which the number -12 is an element.

Acetic acid, hc2h3o2, dissolves and completely dissociates in water and a solvation sphere of water molecules forms around the ions. this solute-solvent interaction

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Suppose that you stir a green powder into a clear liquid. the liquid turns green. you leave the room and come back later to observe that the top of the liquid is clear again. a green substance has settled on the bottom of the container. was the green liquid that you made a compound or a mixture? explain your reasoning.