C. When anhydrous salts, which can exist in hydrated form dissolves, its enthalpy of solution is usually negative whereas when hydrated form of the same salt dissolves, its enthalpy of
solution is always positive. Explain

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

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.

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?