An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper. (1.8, 1.9, 1.10)
a. What is the mass, in grams, of the necklace if it contains 0.24 oz of silver?
b. How many grams of copper are in the necklace?
c. If 18-karat gold has a density of 15.5 g/cm3, what is the volume in cubic centimeters?
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