Middle school chemistry | Khan Academy - Chemical equations | Middle school chemistry | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/ms-chemistry Want to explore more? Check out the full middle school playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HBnhjPgsJU2y1UhMwcYmb5u Chemical equations use symbols and formulas to represent chemical reactions. Reactants, on the left, rearrange to form products, on the right. The law of conservation of matter states that atoms cannot be created or destroyed, so equations must be balanced using coefficients to ensure the same number of each atom appears on both sides. 00:00 Intro 00:43 Chemical formulae recap 01:45 Chemical equations 03:18 Law of conservation of matter 07:21 Summary Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://donate.khanacademy.org/give/419869/#!/donation/checkout Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc