In the third book in Simone Elkeles' New York Times bestselling YA contemporary romance series, Luis Fuentes must choose—his family's past or a future with Nikki Cruz, the girl he loves.
Luis Fuentes has always been sheltered from the gang violence that nearly destroyed his brothers' lives, but that has never stopped him from taking risks to feed his craving for adrenaline.
Nikki Cruz lives by three rules—boys lie...

"The third edition of this widely acclaimed reference book collects together the most important facts about all the chemical elements in a single volume. In addition to chemical, physical, nuclear, and electron data, this edition includes new sections on crystal, biological, and geological data. The alphabetical format of the earlier versions has been retained. Also included are the six newly approved IUPAC names of the elements 104-109; rutherfordium,...

Introduces the different substances found in our material world

Most of the materials around us contain blends of more than one substance. These are mixtures and solutions. Seawater, for example, is a solution of salt and water. The engaging text and vivid illustrations in this book will help readers understand how mixtures and solutions form and how they apply to everyday life. Topics include • the difference between mixtures and solutions • how solutions may be diluted or concentrated • how distillation...

Your examination of the equilibrium constant continues in this episode. Learn exactly what the numerical value for an equilibrium constant tells and doesn't tell you about an equilibrium system.

In this episode, you encounter two "classic" types of chemistry problems and learn the basic characteristics of each. The episode concludes with several practice problems to help you master the skill of solving percent composition problems.