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  2. Molar mass - Wikipedia

    en.wikipedia.org/wiki/Molar_mass

    In chemistry, the molar mass (M) (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical compound is defined as the ratio between the mass and the amount of substance (measured in moles) of any sample of the compound. [1] The molar mass is a bulk, not molecular, property of a substance.

  3. The Method of Mechanical Theorems - Wikipedia

    en.wikipedia.org/wiki/The_Method_of_Mechanical...

    The center of mass of a triangle can be easily found by the following method, also due to Archimedes. [ 1 ] : 14 If a median line is drawn from any one of the vertices of a triangle to the opposite edge E {\displaystyle E} , the triangle will balance on the median, considered as a fulcrum.

  4. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    one of the Gegenbauer functions in analytic number theory (may be replaced by the capital form of the Latin letter P). represents: one of the Gegenbauer functions in analytic number theory. the Dickman–de Bruijn function; the radius in a polar, cylindrical, or spherical coordinate system; the correlation coefficient in statistics

  5. Molecular mass - Wikipedia

    en.wikipedia.org/wiki/Molecular_mass

    The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mol (g/mol). That makes the molar mass an average of many particles or molecules (potentially containing different isotopes), and the molecular mass the mass of one specific particle or molecule. The molar mass is ...

  6. Mole (unit) - Wikipedia

    en.wikipedia.org/wiki/Mole_(unit)

    The mole is widely used in chemistry as a convenient way to express amounts of reactants and amounts of products of chemical reactions. For example, the chemical equation 2 H 2 + O 2 → 2 H 2 O can be interpreted to mean that for each 2 mol molecular hydrogen (H 2) and 1 mol molecular oxygen (O 2) that react, 2 mol of water (H 2 O) form.

  7. 10 Vintage Porcelain Dolls That Are Worth a Fortune

    www.aol.com/10-vintage-porcelain-dolls-worth...

    5. 1878 Schmitt et Fils French Bisque Doll. Snowdrift Antiques/ebay. Price on eBay: $8,500. Porcelain dolls don’t have to be more than 2 feet tall to be worth a lot of money. This little lady ...

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