What are the common units for expressing solution concentration?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.

Which description best characterizes the motion of particles in a solid?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.