Stoichiometry and the mole | Chemistry | Khan Academy - Worked example: Calculating mass percent | AP Chemistry | Khan Academy

Keep going! Check out the next lesson and practice what you’re learning: https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:elemental-composition-of-pure-substances/v/formula-mass-composition Want to explore more? Check out the full Stoichiometry and the mole playlist here: https://youtube.com/playlist?list=PLSQl0a2vh4HDlQzYt6FMr4i4Yf_nyjRN6&si=1hPtTbDzzDQ5JUAw To calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100. View more lessons or practice this subject at https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:elemental-composition-of-pure-substances/v/worked-example-calculating-mass-percent Sections: 00:00 - Calculating percent by mass of carbon in glucose 00:41 - Assuming one mole of glucose 01:32 - Calculating mass of carbon in one mole 02:11 - Total molar mass of glucose 03:26 - Performing the calculation 04:48 - Considering significant figures 05:20 - Final answer: 40.00% carbon by mass ------------------ 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