Homework Help: Chem.

Posted by Anonymous on Tuesday, October 2, 2012 at 4:01am.

In 1928, 1.0 g of Re was isolated from 660 kg of the ore molybenite. The percent by mass of this element in the molybenite was:

1.5 x 10 ^-4 %

How to set this up, given that 600 kg equals 660,000 g. And Avogadro's number 6.022x10^23?

Chem. - DrBob222, Tuesday, October 2, 2012 at 3:05pm
You didn't ask a question. By the way, the ore is molybDenite and the element, Mo, is molybDenum (without the capital letters, of course).

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