Problem 4. Sterling silver contains 92.5 wt% silver and 7.5 wt% copper. Copper is added to silver to make the metal stronger and more durable. A small sterling silver spoon has a mass of 100 grams. Calculate the number of copper and silver atoms in the spoon. (atomic mass Ag =107.9 g/mol, Cu = 63.55 g/mol) (10 points)

Fig: 1