ChainReaction: Chem 100

LEARN IS NOW A REAL COURSE. The Learn section used to be a short outline — about 250 words per chapter. It has been rewritten as twenty-one full chapters totalling roughly 143,000 words, twenty-three to forty-four minutes of reading each. - Chapters now teach the material instead of listing it: 213 worked examples carried to a real answer, and 152 reference tables covering the polyatomic ions, solubility rules, strong acids and bases, standard reduction potentials, VSEPR geometries, thermodynamic sign cases, functional groups and decay modes. - Every calculation was computed and independently recomputed. Every tabulated constant — Ksp values, formation constants, half-lives, standard potentials — was checked against standard references. DRILL THE CHAPTER YOU JUST READ Each chapter now ends with a button that starts a timed run drawn only from that chapter's topic. It reports how many questions back the chapter before you start, and it deliberately does not overwrite your Quick Play high score. THE QUESTION BANK GREW FROM 64 TO 274 Twelve to fourteen questions per topic instead of three. Every question is answerable from its own chapter, and the wrong answers are built from real student errors rather than filler. NO MORE ADVERTISING The ad banner is gone. This version contains no advertising SDK, no analytics and no tracking of any kind, and it makes no network requests at all. BETTER ON iPAD The reading column is now capped and centered instead of stretching the full width of the display, so chapter text stays at a comfortable line length on a 13-inch screen. The home screen is centered to match. ALSO IN THIS RELEASE - A new reference-table layout in the reading view for material that belongs in a table - Fixed the Measurement chapter rendering in the wrong accent color - About now carries the full Limitation of Liability, Release of Claims, Governing Law, Changes and Trademarks sections

Minor improvements and updates.

New for this version: Expanded explanation of lone pairs and mole calaculations. Increased instruction on Chemical Equations.