What is the empirical formula of N2O5?

1 Answer
Truong-Son N.
Dec 27, 2015

You... have it already. You gave the molecular formula, something by which the molecule is actually represented without any reduction of subscript ratios. But...

The empirical formula is the molecular formula with the most reduced subscripts you can get.

55 is (of course) an odd number, and 22 is obviously an even number, but clearly you can't halve 55.

Therefore, "N"_2"O"_5N2O5 is already an empirical formula.

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