(b) The mass of MgO in this experiment is slightly less than that expected from the mass of Mg(NO_(3))_(2) used. Suggest one practical reason for this. __ (Tot

2m)A Some quantities of sublimed and were lost↑× B The resulting absorbed moisture from the atmosphere, causing the lower massG× C Not all \(\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2} \) was present when the was weighed &× D Temperature during the reaction was too high centrifuging gave an inaccurate resultAnswer: In the statement given, \( \mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2} \), which can shorten as , stands for Magnesium nitrate and signifies Magnesium Oxide. The problem alleges that the mass of Magnesium Oxide collected post-dexperiment is flower than what was predicted from the atomassing of Magnesium nitrate.【Final Answer】: A【Explanation】: The backdrop of conservation of mass implies that the mass of the products post the chemical reaction equal the total mass of the reactants. But then, at times, the real result after the reaction might not exactly match theoretically predicted value when some factors are overlooked, like in this example, where the fabricated Magnesium Oxide mass is lesser in comparison to the Magnesium Nitrate's input mass. One technique interpretation is that during the conversion from Magnesium Nitrate encompassing magnesium, a small amount of Magnesium Oxide was sublimed and subsequently lost during the heating step of the experiment. Consequently, this small quantity of lost Magnium Oxide would lower the resultant weight of the product when weighed and lead to lesser than anticipated mass. In brief, Conservation of Mass states the matter can changed form and shape but never misplace its mass. Did this conversation, the absent mass has sure notes vanished, but likely just sublimated during the procedure.