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OpenStudy (anonymous):
Sylvanite is a mineral that contains 28.0% gold by mass. How much sylvanite would you need to dig up to obtain 31.0g of gold?
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OpenStudy (anonymous):
28 percent gold by mass.. which means.. if you dug up 100 grams of sylvanite, you would have 28 grams of gold in it.. so you need 31g of gold, how much sylvanite du u need? ;-)
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