Question

molecular mass od COOH

Answer 1

As atomic mass of C= 12, O=16, and H=1 therefore 12+16+16+1= 45 hence, M.M is 45g/mol.
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Answer 2

Molar Mass, Molecular Weight and Elemental Composition Calculator ... its molar mass and elemental composition: Molar mass of (COOH)2 is 90.0349 g/mol