In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is equal to the heat of the reaction<span>. This is, the net energy released or absorbed (change) during a chemical reaction is the sum of the potential energy of the products less the sum of the potential energy of the reactants.</span>
The units tell you: g/cm³ = Mass (in grams) per (divided by) Volume (in cm³); So: 109/24 = 4.54166..... ⇒ 4.54 g/cm³. Always look at the units. Just like for speed, you might have m/s so this is: Distance (in meters) per (divided by) Time (in seconds).
The apparatus used for paper chromatography are strip of spotted whatman filter paper, Organic solvents, paper strip, trough for solvent, Hook to hold the chromatography paper.
