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  1. Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.

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  3. This widget gets the Lewis structure of chemical compounds. Send feedback | Visit Wolfram|Alpha. Get the free "Lewis Structure Finder" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Chemistry widgets in Wolfram|Alpha.

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  6. Standard thermodynamic Quantities for Chemical Substances at 25°C. Source of data: CRC Handbook of Chemistry and Physics,84th Edition (2004).

  7. pubchem.ncbi.nlm.nih.govPubChem

    Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.

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