When determining the content of magnesium in a granulated medicine preparationcalmagin 0.1532 g of the annealed precipitate were obtained from a 1.8005 g sample ofcalmagin. Calculate the mass percent of MgO in the preparation.
嗯嗯……里面有个calmagin……愣是查了几本字典都查不着……07年39th的预备题……