[填空题]
An oxygen molecule consists of two oxygen73 cke r-v-- ximau5rb)0cbe zs qnmff 5(a(2n t y40( *i qh-j64 qs4whkhuuqezl/t,fatoms whose total mass is $5.3 \times10^{ -26}$ kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is $ 1.9\times10^{-46 }$ $kg \cdot m^2$ From these data, estimate the effective distance between the atoms. $\times10^{-10 }$ m