Answer Expert Verified So, the mass of 2.25×10²² tungsten atoms is 6.87 g .Click to see full answer. Also asked, what is the mass in grams of 3.40 x10 22 atoms he?So the 3.40⋅1022 helium atoms weigh 0.226 gram . what is the mass of 8.00 1022 molecules of nh3? Answer: the mass of 8.00 *10²² molecules of NH3 would be 2.39 g. Also to know is, how many atoms are there in 250 grams of tin? Tin has a molar mass of 118.71g/mol . So, there will be around 2.1 moles of tin atoms.How many moles is 3.52 x10 24 molecules of water?A chemical formula that shows the number and kinds of atoms in a molecule (not the arrangement of the atoms.) Moles in (3.52 X 10^24) molecules of water. 3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.