some hardware stores sell nails by the pound because most customers buy them by the hundreds rather than individual items and counting out several hundred nails would take too long. a customer would still want to know how many nails he or she would receive. if we assume that one dozen of a particular size of nails has a mass of 68 g. how many nails would that individual receive if he purchased 500 grams of nails. show your calculations.
how does using the mole as a counting unit for atoms compare to using a dozen for counting nails?