CHEM 1033 Chapter Notes - Chapter 4.1: Chemical Equation, Stoichiometry
Document Summary
When combine with other atoms to form molecules, their symbols are modified or combined to generate chemical formulas that appropriately represent these species. Extending this symbolism to represent both the identities and the relative quantities of substances undergoing a chemical (or physical) change involves writing and balancing a chemical equation. Consider as an example the reaction between one methane molecule (ch4) and two diatomic oxygen molecules (o2) to produce one carbon dioxide molecule (co2) and two water molecules (h2o). To balance chemical equations is to have equal numbers of atoms for each element involved in the reaction are represented on the reactant and product sides. This is a requirement the equation must satisfy to be consistent with the law of conservation of matter. It may be confirmed by simply summing the numbers of atoms on either side of the arrow and comparing these sums to ensure they are equal. 2 = 2, yes the oxygens on both sides.