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  2. Sodium hydroxide - Wikipedia

    en.wikipedia.org/wiki/Sodium_hydroxide

    A hot water solution containing 73.1% (mass) of NaOH is a eutectic that solidifies at about 62.63 °C as an intimate mix of anhydrous and monohydrate crystals. [ 19 ] [ 18 ] A second stable eutectic composition is 45.4% (mass) of NaOH, that solidifies at about 4.9 °C into a mixture of crystals of the dihydrate and of the 3.5-hydrate.

  3. Amount of substance - Wikipedia

    en.wikipedia.org/wiki/Amount_of_substance

    The molar mass of a substance depends not only on its molecular formula, but also on the distribution of isotopes of each chemical element present in it. For example, the molar mass of calcium-40 is 39.962 590 98 (22) g/mol, whereas the molar mass of calcium-42 is 41.958 618 01 (27) g/mol, and of calcium with the normal isotopic mix is 40.078(4 ...

  4. Equivalent weight - Wikipedia

    en.wikipedia.org/wiki/Equivalent_weight

    Equivalent weights may be calculated from molar masses if the chemistry of the substance is well known: sulfuric acid has a molar mass of 98.078(5) g mol −1, and supplies two moles of hydrogen ions per mole of sulfuric acid, so its equivalent weight is 98.078(5) g mol −1 /2 eq mol −1 = 49.039(3) g eq −1.

  5. Mass fraction (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Mass_fraction_(chemistry)

    where is the molar concentration, and is the molar mass of the component . Mass percentage Mass percentage is defined as the mass fraction multiplied by 100. Mole ...

  6. Molar concentration - Wikipedia

    en.wikipedia.org/wiki/Molar_concentration

    The concentration of pure osmium tetroxide (molar mass = 254.23 g/mol) is c (OsO 4 ) = ⁠ 5.1 kg/L / 254.23 g/mol ⁠ = 20.1 mol/L. A typical protein in bacteria , such as E. coli , may have about 60 copies, and the volume of a bacterium is about 10 −15 L.

  7. Saponification value - Wikipedia

    en.wikipedia.org/wiki/Saponification_value

    2 Calculation of average molecular weight of fats and oils. ... or sodium hydroxide (NaOH) ... 56.1 is the molar mass of KOH. [7]

  8. Table of specific heat capacities - Wikipedia

    en.wikipedia.org/wiki/Table_of_specific_heat...

    A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%). B Calculated values *Derived data by calculation.

  9. Apparent molar property - Wikipedia

    en.wikipedia.org/wiki/Apparent_molar_property

    The apparent molar volume of salt is usually less than the molar volume of the solid salt. For instance, solid NaCl has a volume of 27 cm 3 per mole, but the apparent molar volume at low concentrations is only 16.6 cc/mole. In fact, some aqueous electrolytes have negative apparent molar volumes: NaOH −6.7, LiOH −6.0, and Na 2 CO 3 −6.7 cm ...