10) How many grams are there in 3.8times 10^23 molecules of Nalo?

To solve this problem, we need to find the mass of molecules of NaI (sodium iodide).Given information:- The number of molecules of NaI is .Step 1: Find the molar mass of NaI.Molar mass of NaI = Molar mass of Na + Molar mass of IMolar mass of NaI = 22.99 g/mol + 126.90 g/mol = 149.89 g/molStep 2: Calculate the number of moles of NaI.Number of moles = Number of molecules / Avogadro's numberNumber of moles = molecules / molecules/molNumber of moles = 0.631 molesStep 3: Calculate the mass of NaI.Mass = Number of moles × Molar massMass = 0.631 moles × 149.89 g/molMass = 94.9 gramsTherefore, there are 94.9 grams in molecules of NaI.