This manual provides detailed solutions to all in-chapter as well as the odd-numbered end-of-chapter exercises found in Introductory Chemistry, 2nd Edition by Nivaldo J. Tro. It has been designed to help you master the use of many principles in Chemistry by honing your skills in problem solving. Read each problem carefully to see what it is asking and what information it contains. Then, using the chemistry principles you have learned, attempt to solve the problem. Is it reasonable? Are the units correct? Then check your answer with the Selected Solutions Manual. When you do consult the Selected Solutions Manual, you can use it as tool for learning the principles and processes of chemistry, as well as the route to the right answer.