Air is about 78% nitrogen gas (n2) by mass. the molar mass of nitrogen gas is 28.0 g/mol. a 100.0-g sample of air contains how many moles of nitrogen?

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

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.