What is the molarity of a solution in which 0.83 moles of NaCl are dissolved in enough water to make 185.9 mL of solution?

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.