'Iodine number' is the grams of iodine atoms (atomic mass =127 ~g...

'Iodine number' is the grams of iodine atoms (atomic mass $=127 \mathrm{~g} \mathrm{~mol}^{-1}$ ) that can react completely with100 g of a vegetable oil. Iodine monochloride (ICl) is a reagent used to determine iodine number. In an experiment, $25.00 \mathrm{~cm}^3$ of $0.100 \mathrm{~mol} \mathrm{dm}{ }^{-3}$ ICl was added to 127 g of the oil. The unreacted ICl was found to be equivalent to $40.00 \mathrm{~cm}^3$ of $0.10 \mathrm{~mol} \mathrm{dm}{ }^{-3}$ of $\mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3$. The iodine number of the oil can be deduced as