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HCOOH D. CH3 COOH Which is an empirical formula?
https://www.pdf-archive.com/2016/11/21/questions-for-eci-module-11/
21/11/2016 www.pdf-archive.com
HCOOH C. H2 O D.
https://www.pdf-archive.com/2017/01/22/johnson-s-eciitems-mod14/
22/01/2017 www.pdf-archive.com