How many atoms are in a grain of salt? Try to explain your answer. Your explanation should take the reader through your reasoning step-by-step.

There are approximately 7 4 atoms in a gra in of salt . To arrive at this answer , we can use the atomic mass of sod ium ( Na ), which is the element present in salt . The atomic mass of sod ium is approximately 2 2 . 9 9 g / m ol . \n \n First , we need to determine the mass of a single gra in of salt . This is a relatively small amount , so we can use a reasonable estimate . Let ' s say that a gra in of salt we igh s about 0 . 0 1 gr ams . \n \n Next , we need to convert this mass to mol es . To do this , we can use the formula : \n \n m oles = mass / atomic mass \n \n In this case , the mol es of salt would be : \n \n m oles = 0 . 0 1 g / 2 2 . 9 9 g / m ol = 0 . 0 0 4 5 mol \n \n Now we need to determine the number of atoms in this mol of salt . We can do this by using the atomic mass of sod ium and the mol ar mass of salt : \n \n at oms = mol es x atomic mass \n \n In this case , the number of atoms would be : \n \n at oms = 0 . 0 0 4 5 mol x 2 2 . 9 9 g / m ol = 0 . 0 9 9 atoms \n \n So , there are approximately 0 . 0 9 9 atoms in a gra in of salt . \n \n It ' s important to note that this is a very rough estimate , as the actual number of atoms in a gra in of salt could vary depending on a number of factors , such as the size and shape of the gra in , the pur ity of the salt , and the method used to measure the mass . However , this calculation should give you a rough idea of the number of atoms in a gra in of salt . </s>