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For sucrose (table sugar) we have the molecular formula C12H22O11 and the molar mass would be Molar mass of sucrose = 12x12.011 g + 22x31.008 g + 11x15.999g = 342.3 g Or, we would say that the molar mass of sucrose = 342.3 g/mol (i.e., a mole of sucrose molecules has a mass of 342.3 g).olecular compounds consist of a large collection of molecules. The molar mass (or molecular weight) of a molecular compound is defined in the following way:
C: 12 x 12 = 144 H: 22 x 1 = 22 O: 11 x 16 = 176 The molar mass of sucrose is 342 g / mol 0.257 mol sucrose x 342 grams / mol = 87.894 grams. Edit. Share to: 1  Easy Way to Calculate the pH of Bleach You probably have started learning about pH in your chemistry or biology course.he formula for iron (II) sulfate is FeSO4.H2O, and its gram formula unit mass is 169.92. Therefore, 3.52 formula units of this compound have a mass of 598 grams, to the justi â¦ fied number of significant digits.