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  2. Mass fraction (chemistry) - Wikipedia

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

    Mass fraction can also be expressed, with a denominator of 100, as percentage by mass (in commercial contexts often called percentage by weight, abbreviated wt.% or % w/w; see mass versus weight). It is one way of expressing the composition of a mixture in a dimensionless size ; mole fraction (percentage by moles , mol%) and volume fraction ...

  3. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    Water is ~11% hydrogen by mass but ~67% hydrogen by atomic percent, and these numbers along with the complementary % numbers for oxygen in water, are the largest contributors to overall mass and atomic composition figures. Because of water content, the human body contains more oxygen by mass than any other element, but more hydrogen by atom ...

  4. Human body - Wikipedia

    en.wikipedia.org/wiki/Human_body

    Elements of the human body by mass. Trace elements are less than 1% combined (and each less than 0.1%). Element: Symbol: Percent mass: Percent atoms: Oxygen O 65.0 24.0 Carbon C 18.5 12.0 Hydrogen H 9.5 62.0 Nitrogen N 3.2 1.1 Calcium Ca 1.5 0.22 Phosphorus P 1.0 0.22 Potassium K 0.4 0.03 Sulfur S 0.3 0.038 Sodium Na 0.2 0.037 Chlorine Cl 0.2 0 ...

  5. Body fat percentage - Wikipedia

    en.wikipedia.org/wiki/Body_fat_percentage

    In males, mean percentage body fat ranged from 23% at age 16–19 years to 31% at age 60–79 years. In females, mean percentage body fat ranged from 32% at age 8–11 years to 42% at age 60–79 years. But it is important to recognise that women need at least 9% more body fat than men to live a normal healthy life. [2]

  6. Percentage by mass - Wikipedia

    en.wikipedia.org/?title=Percentage_by_mass&...

    This page was last edited on 10 September 2014, at 23:26 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  7. Brix - Wikipedia

    en.wikipedia.org/wiki/Brix

    Measuring brix and percent acidity of a sudachi. Degrees Brix (symbol °Bx) is a measure of the dissolved solids in a liquid, and is commonly used to measure dissolved sugar content of a solution. [1] One degree Brix is 1 gram of sucrose in 100 grams of solution and represents the strength of the solution as percentage by mass. If the solution ...

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  9. Talk:Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Talk:Composition_of_the...

    The "Fraction of Mass" column is inconsistent with the "Mass" column; the two should sort in the same order since fraction of mass = mass / total human body mass. Example: Rubidium and strontium have the same fraction of mass (4.6x10^-6) but rubidium is listed as 0.00068 kg and strontium 0.00032kg. Arghman 14:18, 29 July 2018 (UTC)