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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:balancing-chemical-equations/v/balancing-chemical-equations-introduction Want to explore more? Check out the full Chemical reactions playlist here: https://youtube.com/playlist?list=PLSQl0a2vh4HCMPYDKDWzckresmNj5geHf&si=5k_qLv5ROTvEOH3R Chemical equations use formulas and symbols to represent chemical reactions. Since matter cannot be created or destroyed, the equation must be balanced. This is done by adjusting the coefficients in front of the chemical formulas to ensure the same number of each type of atom is on both sides of the equation. Sections: 00:00 - Introduction to balancing chemical equations 00:22 - What is a chemical equation? 00:53 - Why balancing is necessary 01:56 - Balancing aluminum atoms 02:20 - Attempting to balance oxygen atoms 02:50 - Avoiding fractional coefficients 03:12 - Multiplying to eliminate fractions 03:49 - Writing the full balanced equation 04:31 - Verifying atom counts on both sides ------------------ 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://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc