90 g of a silver coin was dissolved in s...

90 g of a silver coin was dissolved in strong nitric acid and excess of sodium chloride solution added. The silver chloride precipitate was dried and weighed 71.75 g. Calculate the precentage of silver in the coil (Atomic mass of Ag = 108)
`Ag+2HNO_(3)rarrAgNO_(3)+NO_(2)+H_(2)O`
`AgNO_(3)+NaClrarrAgCl+NaNO_(3)`

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