[CHMA10H3] - Final Exam Guide - Ultimate 27 pages long Study Guide!

• School: UTSC
• Department: Chemistry
• Course: CHMA10H3
• Professor: Nirusha Thavarajah

Document Summary

The amount of product formed in a chemical reaction is related to the amount of reactant that is consumed. Chemical stoichiometry: numerical relationships between the amount of reactants and products in chemical reactions. Chemical reaction: process in which one or more substances are converted into one or more different ones. Combustion reaction: substance combines with oxygen to form one or more oxygen- containing compounds; emits heat, which is critical to supplying energy for society. Unbalanced chemical equations violate the law of conservation of mass. Cannot change subscripts because that would alter the substance itself but changing the coef cient only changes the number of molecules of substance. New atoms do not form during a reaction and old atoms do not vanish. To balance chemical equations, start by balancing the atoms in complex substances before the free atoms and then remember the multiply out any fractions. Chemical reactions involving reactants dissolved in water are among the most common and important.