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Free video lectures,Free Animations, Free Lecture Notes, Free Online Tests, Free Lecture Presentations

Free video lectures,Free Animations, Free Lecture Notes, Free Online Tests, Free Lecture Presentations
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Learn English Online, Free English Lessons, English Classes, Business English Starfall's Learn to Read with phonics ChemReview.NET Learn English Through Movies Homeschool Manager | Homeschool Management Software and App - Homeschool Manager - Homeschool Management Software and App General Chemistry for Students The basics What is Chemistry all about? An introduction to chemical science. Preliminaries: stuff you should know before delving too far into Chemistry - tutorials covering the following topics: classification and properties of matter, density and buoyancy, energy, heat and temperature, units and dimensions, measurement error, significant figures and rounding off (these last three topics are identical with the first three in the lesson described immediately below.) Matter and measure: all about units, uncertainty, significant figures,and how to deal with experimental error. Units and conversion factors - see below LeChatelier's Principle interactive quiz by Gary Bertrand ChemBalancer and Element Quiz - four games you can play online. Balancing Chemical Equations - 1270 reactions, organized into easy, intermediate, and "challenging". Introduction to basic atomics, mole concept, calculations based on formulas and equations, and nomenclature - (S.K. Acids and bases Atomic theory Chemical Bonding

e-Learning for kids Watch Free Documentaries Online | Documentary Heaven Chemistry Virtual Textbook Acid-base chemistry can be extremely confusing, particularly when dealing with weak acids and bases. This set of lessons presents an updated view of the Brønsted-Lowry theory that makes it easy to understand answers to common questions: What's the fundamental difference between a strong acid and a weak acid? Can acid A neutralize base B? Why are some salts acidic and others alkaline? How do buffers work? What governs the shapes of titration curves? This complete rewrite of the previous 1996 pdf document is now organized into seven lessons covering all aspects of the subject. Much emphasis is placed on the practical aspects of calculations, including how to deal with quadratic equations and how to judge when approximations are appropriate.

5 Weak Words You Should Avoid & What to Use Instead When I first began writing, I was unsure of myself. My sentences were filled with meaningless words and fillers. What I didn’t realize is that by using them I was sabotaging myself and my writing. Weak words can sneak into our writing anywhere, anytime and when they do, they destroy the power of our work. I’ve rounded up five weak words to avoid and some helpful tips for what you can use instead. 1. Example: “The swimmer really performed admirably.” Why it’s a problem: The word ‘really’ is a crutch. There’s also the issue of considering what the word “real” means. Thankfully, this problem is easily remedied: “The swimmer really performed admirably.” Can be changed into: “The swimmer performed admirably.” Nothing is lost by cutting ‘really’ from the sentence but simplicity and function is gained. 2. Example: “The article said a lot of things and stuff.” The author Kurt Vonnegut often gave this piece of advice, pity the reader. 3. Example: “I believe the author has a great point here…” 4. 5.

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Chemdex | The Sheffield Chemdex: the directory of chemistry on the WWW since 1993 WebElements Periodic Table of the Elements

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