SOLUTION: British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepa

Question 642363: British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 240 grams of a copper-silver alloy that is 16% copper by weight?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let grams of pure copper needed =
Let grams of British sterling silver needed =
= grams of copper in British sterling silver needed
--------------------
(1)
(2)
-------------------
(2)
(2)
(2)
Substitute this into (1)
(1)
(1)
(1)
22.05 grams of pure copper are needed
217.95 grams of British sterling silver are needed
check:
(1)
(1)
(1)
(1)
OK
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