How many molecules are contained in a 7.20-g sample of dimethylmercury?

Explanation:

Hello,

Dimethylmercury: has a molecular mass of:

Now, the following mass-mole relationship including the Avogadro's number allows us to compute the requested molecules as follows:

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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.