Alright so you know the number of molecules
5.6*10^22
but also know this formula:
#moles= #of molecules / (6.02*10^23)
#moles= (5.6*10^22) / (6.02*10^23)
#moles= 0.093023255
#moles= mass/ molar mass of NaCl
therefore #moles*molar mass of NaCl= mass
0.093023255 * 58.44 = 5.43 g of NaCl
