There are 0.062 moles in 3.6 grams of NaCl. Therefore there will be 3.73372773e+22 molecules.
First get the molecular weight of NaCl which is 58.443 gram/mole.
Get the number of grams. For this it will be 3.6 grams.
Then divide the grams by the atomic mass: 3.6 grams/58.443 gram/mole.
After that multiply by 1 mole for units to cancel.
Then convert the answer (moles) to molecules.
Easily convert Moles to Molecules using this online calculator at Convertunits.com.
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