Concentration-like physical quotient quantities built up on the base above

Example: oxygen-nitrogen gas mixture (O and N)
 

quantity	equation	quantity	equation	unit
wB mass fraction		mass ratio
jB volume fraction		volume ratio
xB amount-of-substance fraction		rB amount-of-substance ratio
molecular fraction		molecular ratio
range of the function	0-1		0-endless

The mole ratio is equal to the molecule ratio because of the Avogadro's Law and the definition of the mole unit.

The "unit one" is under dispute at a commission of the Bureau Internationale des Poids et Measures & and doesn't seem usable for countable quantities.

ratio: quantity of one component divided by the other component (the solvent)
fraction: quantity of one component divided by the whole mixture

Notice that the unit "percent" can be undestood in eight different meanings and different values.

The number of millet divided by the number of the whole mixture (millet plus wheat) is not equal to its molecule ratio. I can not name it. Count ratio?

Quantities divided by the volume of the mixture (they are called concentration)
 

mass	mass concentration
amount of substance	amount-of-substance concentration
volume volume fraction	volume fraction
number, entity, count	molecular concentration

Oxygen content of the normal air (is it 21 percent, less or more?)
 

volume fraction	jO	0.2093
mass fraction	wO	0.232
amount-of-substance fraction	xO	0.2117
amount-of-substance ratio (for nitrogen)	rO	0.2178
mass concentration	rO	0.3

Created by János Zana