ALERT: Before you purchase, check with your instructor or review your course syllabus to ensure that you select the correct ISBN. Several versions of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID, provided by your instructor, to register for and use Pearson's MyLab & Mastering products. 013416248X / 9780134162485 MasteringChemistry with Pearson eText -- Standalone Access Card -- for Chemistry: A Molecular Approach 4/e Package consists of: 0134075358 / 9780134075358 MasteringChemistry Content -- Access Card Package Sales Accumulator -- for Chemistry: A Molecular Approach 4/e 0134126416 / 9780134126418 MasteringChemistry -- Pearson eText 2.0 Upgrade -- for Chemistry: A Molecular Approach 4/e 0321962656 / 9780321962652 ChemAxon -- Content -- Sales Accumulator 1/e