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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: is3zzz on September 22, 2007, 11:19:07 AM

Title: Another Density/volume problem
Post by: is3zzz on September 22, 2007, 11:19:07 AM

Can anyone solve this..
Question : John is given a sample of precious alloy of density 11 g/cm3.  The piece of metal is 5.696 cm long and has a square end of 2.97 × 2.97 cm.  He is told to machine this piece of metal into a cylinder with a diameter of 2.97 cm.  He is told that he will be given the shavings to sell on his own.  The price of the alloy is $4.03/g.  How much money will John earn?
Error tolerance:  ±$0.01

My answ: $477.98

My attempt:
Volume= 50.2 cm²
Mass= 552.2

Volume cylinder= 39.46 cm³
Volume of shaving= 10.74 cm³

11g/cm³ x 10.74 cm³ = 118.14 g
118.14g x $4.03/g = $477.98


Does my answer look correct?  :-\

Title: Re: Another Density/volume problem
Post by: Yggdrasil on September 22, 2007, 11:44:19 AM

Looks good to me.  Good job.