How many moles of water are represented in a breaker containing 45.9g h2o

There are 2.55 moles of water.

Explanation:

First you have to calculate the molar mass fo water ⇒ 18 grs/mol.

Then 18 grs 1 mol H2O

        45.9 grs 2.55 moles of H2O

There are 2.55 moles of water.

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.