What branches of chemistry use chromatography often?

Physical chemistry/ surface chemistry

Explanation:

Surface chemistry is the study of chemical reactions at surfaces of substances. It includes topics like adsorption, heterogeneous catalysis, formation of colloids, corrosion, electrode processes, and chromatography.

Hope this helped!

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)