You will also study the mole as a unit of measurement and Avogadro's number, which is equal to 6.023 × 10 to the power of 23, and is the constant of proportionality.

You will study molecular formulas, which are essentially the actual number of atoms in a molecule, and empirical formulas that tell you what people have observed. This course will introduce you to the fundamentals of molecules and their composition. Once you’ve had a chance to look at the course, we’d love to hear what you think via this short and sweet feedback form.Molecules are made up of atoms and are the smallest particle in a chemical element or compound. Students can also evaluate their progress using quizzes, unit tests, and the course challenge. Mastery-based practice that allows students to repeat exercises, seeing new questions each time, until they feel like they’ve mastered the concepts.Many of the videos are worked examples of open-ended questions, helping students better prepare for free-response questions on the exam. More than 100 new videos covering everything from photoelectron spectroscopy to intermolecular forces.Every question includes hints or rationales to help students improve their understanding. Over 640 AP -style questions tightly aligned to topics on the exam.In its current form, AP Chemistry beta covers topics from the first seven units of AP Chemistry.

Eventually, the beta course will replace the older AP Chemistry course that is already on Khan Academy. What do we mean by “beta” in this context? In short, this course is work in progress: not only will we be adding more content over time, but we’ll also be making changes to already-released content based on feedback from users like you. Khan Academy is excited to announce the launch of a brand-new science course: AP® Chemistry beta!

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