Choose the weakest acid?. 1. H2Se, H2O, H2Te, or H2S. 2. H2SeO4, H2SeO3, H2SO3, or H2SO4. 3. HClO3, H2Se, HBr, HNO4
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First, you need to count copper mass in alloy.
Second, you have to make an equation an find x ( the copper mass must be added). The answer is: 13,5g pure copper
Second, you have to make an equation an find x ( the copper mass must be added). The answer is: 13,5g pure copper