The mass and molarity of chemical compounds can be calculated based on the molar mass of the compound. Chlorine exists in four oxides: chlorine monoxide, chlorine dioxide, dichlorine heptoxide and dichlorine hexoxide, each of which is highly reactive and unstable. Ab initio study of the molecular structure and vibrational spectra of dichlorine hexoxide and its significance to stratospheric ozone depletion. Weights of atoms and isotopes are from NIST article. 1000 kg Fe x (1 kmol Fe / 55.8 kg Fe) x (1 kmol Fe2O3 / 2 kmol Fe) x (159.6 kg Fe2O3 / 1 kmol Fe2O3) = 1430 kg Fe2O3 ..... which should be rounded to two significant digits: 1400 kg Fe2O3. The empirical formula is the lowest possible whole-number ratio of the elements. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. Weights of atoms and isotopes are from NIST article. Molar mass of NaCl is 58.443, how many grams is 5 mole NaCl? The compound dichlorine hexoxide has an empirical formula ClO 3 and the molecular formula Cl 2 O 6; ... Once the relative mass contributions of elements are known, this information can be converted into moles. The table shows element percentages for Cl 2 O 6 (dichlorine hexoxide). (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. The mass (in grams) of a compound is equal to its molarity (in moles) multiply its molar mass: grams = mole × molar mass. Molecular formulas contain no information about the arrangement of atoms. Chemical Physics 1995 , 199 (2-3) , 183-193. E.g. Dichlorine hexoxide is the chemical compound with the molecular formula Cl 2 O 6, which is correct for its gaseous state.However, in liquid or solid form, this chlorine oxide ionizes into the dark red ionic compound chloryl perchlorate [ClO 2] + [ClO 4] −, which may be thought of as the mixed anhydride of chloric and perchloric acids.. However, in liquid or solid form, this chlorine oxide ionizes into the dark red ionic compound chloryl perchlorate [ClO 2 ] + [ClO 4 ] − , which may be thought of as the mixed anhydride of chloric and perchloric acids. Chlorine’s melting point is -101° C (-149.8° F), while its density is 3.21*10 -3 g.cm … Chlorine can also displace heavier halogens like bromine and iodine. Element analysis. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). grams = 58.443 × 5 = 292.215 (g) Dichlorine hexoxide is the chemical compound with the molecular formula Cl 2 O 6, which is correct for its gaseous state. The compound dichlorine hexoxide has an empirical formula ClO 3 and the molecular formula Cl 2 O 6; The compound hydrogen peroxide has the empirical formula HO and the molecular formula H 2 O 2; Molecular Formulas and Structural Formulas.