Setting up linear equations for problems dealing with specific gravity.

  • Thread starter Agnostic
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  • #1
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I can not, for the life of me, figure out how to set the following up into a system of equations.

An object composed of x gram-mole of lead (specific gravity 11) and y gram-mole of tin(specific gravity 7) weights 82 gram-moles in air and 77 gram-moles in oil of specific gravity of 1/2. Find x and y.

Finding x and y is simple, if I could figure out the right way to set it up...:(
 

Answers and Replies

  • #2
lightgrav
Homework Helper
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I would start with a statement of mass addition,
and a statement of volume addition.
The buoyant Force (5gram)g = V*(.5gram/cm^3)g
gives you a way to write the total Volume.
 
  • #3
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I still cant get it to come out to the correct answer...
 
  • #4
lightgrav
Homework Helper
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"correct answer" might be wrong.
maybe youmade an algebra mistake...
what have you done so far?
 

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