Lithium oxide ($$Li_2O$$, molar mass $$= 30$$ $$\text{g mol}^{-1}$$) is used in space shuttles to remove water vapour according to the following reaction $$Li_2O (s) + H_2O (g) \rightarrow 2LiOH (s)$$.
If 60 kg of water and 45 kg of $$Li_2O$$ are present in a shuttle
I. water will be removed completely
II. $$Li_2O$$ will be the limiting reagent
III. 100 kg of $$Li_2O$$ will be required to completely remove the water present
IV. 27 kg of water will remain in the shuttle at the end of the reaction