Household sugar sucrose has the molecular formula c12h22o11. what is the carbon in sucrose by mass

            %age of Carbon is 42.10 %.

Explanation:
                   In order to find the %age of elements present in a molecule we will use following formula,

%age of Element  =  (Mass of Element / Mass of Molecule) × 100

The molecular mass of Sucrose is.

                                =  (12)12  +  (1)22  +  (16)11
Where;
            12  =  Atomic mass of Carbon

              1  =  Atomic Mass of Hydrogen

            16  =  Atomic Mass of Oxygen

                                  =  144  +  22  +  176

                                  =   342 g/mol
%age of C;
                                  =  (144 / 342) ×100  =  42.10 %

%age of H;
                                  =  (22 / 342) ×100    =  06.42 %

%age of O;
                                  =  (176 / 342) ×100  =  51.46 %