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lead(V) chromate. 11. diphosphorus pentoxide. 12. potassium permanganate. 13. sodium hydrogen carbonate. 14. 2 1. KMnO. GRAM FORMULA MASS. Determine the gram formula mass (the mass of one mole) of each compound below. GRAM FORMULA MASS. Determine the gram formula mass (the mass of one mole) of each compound below. 158.0a. 1. KMnO,. 7400a. -. (29. 1 549 (160G. 2. KCI 3505. Gram Formula Mass. A mole is a very important concept in stoichiometry. One mole of any element is equal to its atomic weight in grams. respect to the number of atoms in order to obtain the molar mass. 212.27 g/mol. 9. hydrochloric acid HCl. 36.46 g/mol. Worksheet 11.1. KEY HW_Conversions(1).docx - 1 Gram Formula Mass Determine the gram formula mass(mass of one mole of each compound below 1 KMnO4 2 KCl 3 Na2SO4 4 Ca(NO3)2 5 9. Find mass in grams of 9.03 moles of H2S. 10. Determine grams in 1.204 mole of NH3. Consider the molecule CuNH4Cl3 as you answer 11 - 20. One mole of a compound contains Avogadro's number (6.022 x 1023) of molecules (molecular compound) or formula units (ionic compound). The molar mass of aDetermine the gram formula mass (the mass of one mole) of each compound below. 158.04g/mal. 1. KMnO₂. 39.1+54.94 + 64. 74.55g/mal. 2. KCI. 3. Na₂SO4.