The answer for that is 16, math right?
A coordination number can be determined by the usage of an atom towards a molecule from seeing how many numbers of atoms would have to be combined together in an atom.
Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl. In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals.
Answer:
C-sp, tetrahedral, 180
C-s-p, linear, 180
CH_3-sp3, linear, 109.5
C-sp3, linear, 109.5
C-sp2, tetrahedral, 109.5
CH_3-sp3, tetrahedral, 109.5
CH_3-sp, linear, 180
CH_3-sp2, tetrahedral, 180
Explanation: