What is the volume of a platinum ring having a mass of 5.4 oz?

Question

Answer in centimeters cubed.

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Answer 1 · 2016-09-14T16:40:07

Approx. #7*cm^3#

#rho,"density "Pt=21.45*g*cm^-3#.

Now (after finding out that #1*oz=28.35*g#), our calculation is:

#(28.35*cancelg*cancel(oz^-1)xx5.4*cancel(oz))/(21.45*cancelg*cm^-3)# #~=# #7*cm^3#

I think platinum is currently trading at #$1000" USD"*oz^-1#, so don't lose that ring!