en.wikipedia.org/wiki/Parts-per_notation

In science and engineering, the parts-per notation is a set of pseudo-units to
describe small values of miscellaneous dimensionless quantities, e.g. mole
fraction or mass fraction. ... The unit “...

chemistry.stackexchange.com/questions/13673/what-is-defined-by-part-by-weight-in-the-definition-of-equivalent-weight

Jun 17, 2014 ... What is defined by part by weight in the definition of equivalent weight? ... What
does “parts by weight” or “parts by mass” specifically mean?

whatis.techtarget.com/definition/atomic-mass-unit-AMU-or-amu

Part of the IT standards and organizations glossary: ... The mass of an atom in
AMU is roughly equal to the sum of the number of protons and neutrons in the ...

chem-guide.blogspot.com/2010/03/concept-of-equivalent-mass.html

... displaces 1 part of hydrogen or 8 parts of oxygen or 35.5 parts of chlorine by
mass. ... It is so because, we can not conceive of reactions involving chemical
entities with ... of elements and few compounds by using this definition of
equivalent weight. ... Equivalent mass is equal to the molecular or atomic mass
divided by the ...

www.convert-me.com/en/convert/percent/uppb.html

Conversion chart for parts per billion (Percentages and Parts, fractions and
percent). Instant conversion for fraction, percent, metric (SI) prefixes, etc.

www.greenfacts.org/glossary/pqrs/parts-per-billion.htm

Definition: A weight to weight ratio used to describe concentrations. Parts per
billion (ppb) is the number of units of mass of a contaminant per 1000 million
units of total mass. ... In that case 1 ppb equals 1 µg of substance per kg of solid (
µg/kg).

www.engineeringtoolbox.com/ppm-d_1039.html

Parts per million is the mass ratio between the pollutant component and the ... In
the metric system ppm can be expressed in terms of milligram versus kg where.

www.researchgate.net/post/How_to_convert_ppm_to_weight_part_per_hundred_in_case_of_Major_element

Feb 1, 2016 ... So, one percent is equal to 10000 parts-per million: ... The factor 10'000 to
convert wt% to ppm is correct, but how to do it (dividing are ... each of those parts
is, again, by definition a millionth, or a part per million of the whole.

chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Physical_Properties_of_Matter/Solutions_and_Mixtures/Solution_Basics/Units_Of_Concentration

Sep 13, 2016 ... (1.1) Mass Percent = Mass of Solute Mass of Solution × 100 % ... It will have an
alcohol content of 75.5% (w/w) as per definition of "proof". ... Parts per Million: A
concentration of a solution that contained 1 g solute .... Also, keep in mind that the
sum of each of the solution's substances' mole fr...

www.britannica.com/topic/volume

Britannica does not currently have an article on this topic. ... Density offers a
convenient means of obtaining the mass of a body from its ... On the other hand,
mixing roughly equal parts of acetone and chloroform produces a small decrease
.