2d ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course! How can we reuse a code routine over and over again? Learn how to use functions to package a block of code and parameters to generalize it. Learn how to write your own function definitions, and explore how the computer executes a function call. View the program used in this video at: https://www.khanacademy.org/python-program/health-potions/4851312333602816 Course link: https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d ..read more
4d ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:states-of-matter/x2613d8165d88df5e:electronegativity-and-bond-polarity/v/molecular-polarity Molecular polarity is determined not just by individual polar bonds, but by the molecule’s 3D shape. Even if bonds are polar, the overall molecule may be nonpolar if the shape cancels out the dipoles. Whether a molecule is polar or not influences properties like solubility, boiling points, and intermolecular interactions. Sections: 00:00 - Introd ..read more
6d ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:stoichiometry-and-the-mole/x2613d8165d88df5e:mole-calculations/v/calculations-using-avogadro-s-number-part-2 Practice converting from grams to moles to molecules, formula units, and atoms through these four example problems. Grams are the standard unit of mass in the laboratory, while moles are used in calculations to relate mass to the number of particles. This system of units allows for communication between the microscopic world of a ..read more
6d ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:stoichiometry-and-the-mole/x2613d8165d88df5e:moles-and-molar-mass/v/calculations-using-avogadro-s-number-part-1 Atomic mass units (a.m.u.) are much smaller than grams and are used to measure atomic-scale masses. Avogadro's number (6.022 x 10²³) represents the quantity of particles in one mole, linking atomic masses to measurable amounts in grams. Molar mass, expressed in grams per mole, bridges these concepts, enabling the conversion be ..read more
1w ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course! How do programmers build games with thousands of lines of code? Learn how programmers use modularity to break down a problem into smaller subproblems. Recognize why organizing code into modules and functions allows for better reusability, testability, and readability. Course link: https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:playing-games-with-functions Course playlist: https://www.youtube.com/playlist?list=PLSQl ..read more
1w ago
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:solutions-acids-and-bases/x2613d8165d88df5e:solubility/v/double-replacement-reactions Double replacement reactions occur when two compounds exchange ions, forming two new compounds. The driving force in these reactions is often the formation of a precipitate, a gas, or water. A solubility chart is commonly used to predict whether a potential product will be insoluble and therefore precipitate out of solution. This allows us to determine ..read more
1w ago
Life’s BIG moments come with BIG feelings! The @KhanAcademyKids team is here to help with a new set of lessons all about emotions. Open the free Khan Academy Kids app to play games that help kids manage feelings like happiness, sadness, and everything in between. Join Kodi the Bear to make a face, or practice calming scary thoughts by naming feelings. Expressive artwork, cute new emojis, and playful animations help little learners begin the journey of social-emotional development in a fun and engaging way. The new lessons are available for PreK-2nd grade and cover emotions like disappointment ..read more
2w ago
?‍? Hey, teachers! Looking for a computer science curriculum to use in your classroom? Try Khan Academy's new Intro to CS - Python course! ? Reclaim your prep time with our extensive library of Python practice materials. Each new concept comes with in-depth instructional videos, interactive example programs, code reading exercises, worked examples, and scaffolded programming challenges. Our platform gives students instant feedback to keep them moving, so you can spend more time on the big questions and less time on the small stuff. ? Check out our Intro to Computer Science - Python course now ..read more