Which of the following substances would best be measured using mole quantities?

Question 2 options:

people in the world

coin money in circulation

molecules of water in the ocean

hairs on a shaggy dog

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

i think is conclusions.i think so