所屬科目：研究所、轉學考(插大)◆材料導論
(b) Calculate the density in g/cm3 of UO2 (uranium oxide), which has the calcium fluoride structure. (Ionic radii: = 0.11 nm and = 0.13 nm； the atomic mass of uranium is 238 amu and oxygen is 16 amu).
(c) Calculate the average molecular weight Mm for a plastic material that has the mean molecular weight fractions fi for the molecular weight ranges listed in the following table:
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= 0.11 nm and 
= 0.13 nm； the atomic mass of uranium is 238
amu and oxygen is 16 amu).