Posted by Heather on Thursday, September 11, 2008 at 7:15am.
Notice that mass is density*volume.
total mass=massiron*densityiron*volume + masscopper*densitycopper*volume
Now, divide by total mass
1= fractioniron*densityiron*volume/mass + fractionCu*densityCu*volume/mass.
now note that volume/mass=1/avgdensity
and that fractionCu=1-fractioniron
That should be enough for you to grunt thru the algebra.
I am confused on what the fraction is?? and what is my volume? could you please clear this up?
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