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Old Aug 31st 2017, 07:41 AM   #1
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Finding unknown element

Hi folks! A chem student here. I have a homework problem that I feel might be a curve ball and thought i should get a second opinion. Here it goes....

​A mass of 0.6807g of carbon and a mass of 3.453g of an unknown element contain equal number of atoms.Find the identity of the unknown element?
I am thinking that if the unknown element is 5.072 times heavier than carbon than, all that I have to do is find out which element has a mass of 60.91.

My method: 3.453g / 0.6807g = 5.072
5.072 * 12.01 = 60.91

I believe the element is Cobalt. Am i correct?
Thanks for your replies!
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