مستنقع سياسة على أي حال guld ring 18 karat 16 gram الإيرادات لاسلكي مكون
SOLVED: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
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