Which of these have a double bond? Pick all that apply: SiCL2Br2
H2O
HBr
SeBr2
CO2

Here goes ur answer

CO2

Explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.