Draw Lewis structures for the following species, indicating formal charges and resonance where applicable: (a) (b) (c) (d) S2N2 (a cyclic structure with S and N alternating)
Chemistry 105 – WEEK 9 By Gustavo Silva Chapter 8 – Chemical Equations - They are notations for a chemical change - They are used to show how the reactants changed to products and show exactly how many of them were needed and formed - The equation must be balanced: there must be the same number of an atom in both sides of the equation - Information about how the reaction proceeded can be added above the equation arrow - Physical states are represented by (s), (l), (g) and (aq) after each compound - The coefficients of chemical equations can mean moles instead of molecules Law of Conservation of Mass - The total mass of the products must be the same total mass as the reactants Types of Chemical Reactions - COMBINATION or SYNTHESIS
