How many monovalent oxygen atoms are present in the mineral kinoite, ?

CHEMISTRY · Subjective · CBSE · Chemistry · Atoms and Molecules · Atoms and Molecules

Problem

How many monovalent oxygen atoms are present in the mineral kinoite,

\text{Ca}_2^{2+}\text{Cu}_2^{2+}\text{Si}_3\text{O}_{10}\cdot2\text{H}_2\text{O}