In english, and in chemistry, "mass concentration" does refer to
<mass>/<volume> but the term seems to be used only for mixtures.
"Density" in the common scientific language, refers to the volumetric
mass density of a pure substance.
It is unfortunately impossible with the diamensional analysis only to
know the quantity context, but for english native people, "density"
should be better understood.
In english, and in chemistry, "mass concentration" does refer to
<mass>
/<volume>
but the term seems to be used only for mixtures."Density" in the common scientific language, refers to the volumetric mass density of a pure substance.
It is unfortunately impossible with the diamensional analysis only to know the quantity context, but for english native people, "density" should be better understood.
This explanation could explain why this kind has been renamed in ruby-units by https://github.com/olbrich/ruby-units/commit/0915620b7815302b50d73c77e4ab34ee5d7612b2.
Sources: https://en.wikipedia.org/wiki/Density https://en.wikipedia.org/wiki/Mass_concentration_(chemistry)