How many moles of hydrogen gas are produced when 0.066 mole of sodium is completely reacted? f 0.033 mol h2 g 0.099 mol h2 h 0.066 mol h2 j 0.022 mol h2

what are the choices?

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.