Calculate the theoretical density, in g/cm3, of an AX compound given the following information: The ionic radii of the cation and anion are 0.077 and 0.140 nm, respectively, and their atomic weights are 55.8 and 16.0 g/mol, respectively. Hint: predict the crystal structure by determining the expected coordination for these ions, based on their radii ratio. Answer Format X. XX Unit: g/cm3