Inter atomic distance = 1.13 Å
Mass of carbon atom = 12
Mass of oxygen atom = 16
Let C.M. of molecules lies at a distance of X from oxygen atom
\(m_1r_1 = m_2r_2\)
\(16X = 12(1.13 - X)\)
\(16X = 13.56 - 12X\)
\(28 X = 13.56\)
\(X = \frac{13.56}{28}\)
\(X = 0.484 \) Å