# Chapter 3 - Chemical Reactions and Reaction Stoichiometry - Exercises: 3.52a

H2C2O4

#### Work Step by Step

HCO2 is the empirical formula. H is 1 C is 12 O is 16 so 2*16 = 32 1 + 12 + 32 = 45 g/mol The molar mass is 90 so 90/45 = 2. We multiply the empirical formula by 2 and get H2C2O4

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