https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:chemical-changes/xc370bc422b7f75fc:chemical-reactions/v/chemical-equations 2025-03-21T20:29:57.678923887Z Chemical equations 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. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/d3564b9f-eec6-4925-a114-6533dffea9c2_1280_720_base.png Chemical equations 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. https://cdn.kastatic.org/ka-youtube-converted/_c6wm4jl8BU.mp4/_c6wm4jl8BU.mp4 485 Balancing chemical equations https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/a/symbols-in-chemical-equations 2026-03-19T20:22:14.979311387Z Symbols in chemical equations Learn the meaning behind the symbols we use to represent chemical reactions. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:balancing-chemical-equations/v/balancing-chemical-equations-introduction 2023-12-18T19:15:22.874322042Z Balancing chemical equations A balanced chemical equation shows the same number of each type of atom on both sides of the arrow. video https://cdn.kastatic.org/googleusercontent/KuGYlI3J-XDdXgteNvXaGiRtfGJ7BYAEIwASrFK3vwIEK0Hg2HRetbOfUB2QH9X_quZiNTrYC8LBuW5oLab5C3E Balancing chemical equations A balanced chemical equation shows the same number of each type of atom on both sides of the arrow. https://cdn.kastatic.org/ka-youtube-converted/TUuABq95BBM.mp4/TUuABq95BBM.mp4 304 Balancing chemical equations https://www.khanacademy.org/science/revision-odisha-class-7-sciencein/x65716bffe06ac65c:week-1/x65716bffe06ac65c:physical-and-chemical-changes/e/balancing-equations-of-simple-molecules 2025-04-06T05:39:20.526945352Z Balancing equations of simple molecules. Lest balance some chemical equations! Shankar R exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/e/apply-representing-chemical-reactions 2026-03-02T06:20:38.576309557Z Apply: representing chemical reactions Apply your understanding of using chemical equations to represent chemical reactions in this set of free practice questions. Fig exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:representing-chemical-reactions/e/apply-counting-atoms-in-chemical-equations 2024-03-08T16:11:13.121317577Z Apply: counting atoms in chemical equations Apply your understanding of subscripts and coefficients in chemical equations in this set of free practice questions. Fig exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:balancing-chemical-equations/e/apply-balancing-equations 2024-02-23T23:54:24.895265717Z Apply: balancing equations Apply your understanding of the conservation of matter in chemical equations in this set of free practice questions. Fig exercise