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"Calculate the molecular masses of H 2 , O 2 , C1 2 , CO 2 , CH4, C 2 H 6 , C 2 H 4 , NH 3 , CH 3 OH."
<https://www.askiitians.com/forums/9-grade-science/calculate-the-molecular-masses-of-h-2-o-2-c1-2_268860.htm>