1. The problem statement, all variables and given/known data An oxygen molecule consists of two oxygen atoms whose total mass is 5.3x10^-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.9 x 10^-46 kg*m^2. From this data, estimate the effective distance between the atoms. 2. Relevant equations ## I = M1R^2 + M2R^2 ## 3. The attempt at a solution I = (M1+M2)R^2 1.9 x 10^-46 kg*m^2 = (5.3 x 10^-26kg)R^2 R = 5.99 x 10^-11 m Although I got that this is the radius, this is not the answer to the problem. I'm not exactly sure what I did wrong, as it seems right to me. Could anyone check my work? Thanks!