Asked by Drew

Now if your lab partner determined that there were 3.824 x 1023 atoms of H in an unknown sample of C2H4Cl2, how many milligrams would the unknown sample weigh?
Answered by bobpursley
divide that number by 4, that will be the number of molecules.

mass=numbermolecules/avagnumber * molmass of the molecle (in grams)