An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper.
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 the 18 - karat gold has a density of 15.5g/cm^3, what is the volume in cubic centimeters?
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