0.1 mole of compound S will weigh ...... g, (given the molar mass in g mol−1^{-1}−1 C = 12, H = 1, O = 16)
The molar mass of the water insoluble product formed from the fusion of chromite ore FeCr2O4FeCr_2\text{O}_4FeCr2O4 with Na2CO3Na_2\text{CO}_3Na2CO3 in presence of O2O_2O2 is ....... g mol−1^{-1}−1: