Devon S.

asked • 04/01/19

An alloy of brass is composed of 84.6% copper, 5.20% tin, 6.70% lead, and zinc. The number of pounds of zinc required to make 520.0 pounds of alloy is "_____"

Obviously this is a homework question for my trade school. What I don't get about this is the wording. The zinc equals 3.5% of an alloy from what I put together. I don't understand though. Do these percentages amount to the percentages of a pound of the named material? The way it's worded doesn't seem to make sense to me. If I did this the way my brain is trying to put it together, the answer would be 148.5714285714286. Can somebody fact check this for me?

1 Expert Answer


Brendan P. answered • 04/03/19

UC Berkeley ChemE Grad who loves tutoring math and science

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