Unit of density =g/mL.
Step-by-step explanation:
If mass of substance is  given and volume of substance is given then
Density of the substance is defind as the mass per unit volume .Density=
d=
Where
d= Density of given substance
M= Mass of given substance
V= Volume of given substance
Density tell us how much quantity of substance  in 1 cubic unit of volume .
Units of density of substance  vary with the unit of given mass of substance  and unit of given volume of substance .
If mass of the substance given in Kg and volume  of substance given in cubic metre then unit of density of substance
Unit of density of substance = kg/m^3.
If mass of substance given in gram and volume of substance in cubic centimetre then
Unit of density of substance= g/cm^3.