Question
Pure gold is usually too soft for jewelry, so it is often alloyed with other metals. How many gold atoms are in a 0.255-ounce 18 K gold bracelet? (18 K gold is 75% gold by mass.)
Step 1
We know that 1 ounce is approximately 28.3495 grams. So, the mass of the bracelet in grams is: \[0.255 \, \text{oz} \times 28.3495 \, \frac{\text{g}}{\text{oz}} = 7.22913 \, \text{g}\] Show more…
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Pure gold is usually too soft for jewelry, so it is often alloyed with other metals. How many gold atoms are in an 0.255 - ounce, 18 $\mathrm{K}$ gold bracelet? (18 K gold is 75$\%$ gold by mass.)
For thousands of years, gold has been considered one of Earth's most precious metals. One hundred percent pure gold is 24 -karat gold, which is too soft to be made into jewelry. In the United States, most gold jewelry is 14 -karat gold, approximately 58$\%$ gold. If 18 -karat gold is 75$\%$ gold and 12 -karat gold is 50$\%$ gold, how much of each should be used to make a 14 -karat gold bracelet weighing 300 grams?
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F. For thousands of years, gold has been considered one of Earth's most precious metals. One hundred percent pure gold is 24 -karat gold, which is too soft to be made into jewelry. In the United States, most gold jewelry is 14 -karat gold, approximately $58 \%$ gold. If 18 -karat gold is $75 \%$ gold and 12 -karat gold is $50 \%$ gold, how much of each should be used to make a 14 -karat gold bracelet weighing 300 grams?
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