Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. Calculate the molar mass of Sucrose in grams per mole or search for a chemical formula or substance., To find the mole fraction and percentage of each element in C12H22O11, divide each total from step 3 by the total molar mass found in step 4: The molar mass and molecular weight of C12H22O11 (Sucrose) is 342.296., Sucrose Formula: C 12 H 22 O 11 Molecular weight: 342.2965 IUPAC Standard InChI: InChI=1S/C12H22O11/c13-1-4-6 (16)8 (18)9 (19)11 (21-4)23-12 (3-15)10 (20)7 (17)5 (2-14)22-12/h4-11,13-20H,1-3H2/t4-,5?,6-,7?,8+,9-,10?,11-,12?/m0/s1 Copy Sheet of paper on top of another sheet, Molar Mass, Molecular Weight and Elemental Composition Calculator Enter a chemical formula to calculate its molar mass and elemental composition: Molar mass of Sucrose (C 12 H 22 O 11) is 342.2965 g/mol, One sucrose molecule weighs approximately 342.30 grams per mole, which translates to about 0.000342 grams per molecule. Sucrose is a well-known carbohydrate, commonly referred to as table sugar. It’s a disaccharide composed of two monosaccharides: glucose and fructose., Result: The molecular weight and molar mass of Sucrose (C12H22O11) is 342.3007 g/mol. What is the mass percent composition of Oxygen (O) in Sucrose (C 12 H 22 O 11)? Find the mass of Oxygen (O) in C 12 H 22 O 11 by multiplying the atomic weight of an O-atom with the total number of O-atoms in C 12 H 22 O 11 i.e., 11..