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OpenStudy (anonymous):
What is cobalt's average atomic mass?
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OpenStudy (aaronq):
this information is given in a periodic table, such as www.ptable.com
OpenStudy (goformit100):
First of all @nellbell1024 : A Warm Welcome to 'Open Study'. Please Read CoC (compulsory to read by all "Open Study" users) : http://openstudy.com/code-of-conduct
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