Posted by Richard ineed help on Sunday, September 20, 2009 at 1:30pm.
Take a 100 g sample. This will give you
62.0 g C
21.1 g N
100-21.1-62.0 = ?? g O
Now convert each of these grams into moles. moles = g/atomic mass.
The empirical formula consists of small whole numbers for the atoms; therefore, find the ratio of these moles to each other in small whole numbers. The easiest way to do that is to divide the smallest number by itself. That will make the smallest number 1.00. Divide the other values by the same small number. By the way, check the values in your post to make sure there is no typo. Second, is this a book problem or a lab problem?
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