How many of the following molecules are polar? Pcl5 cos xeo3 sebr2

Three (3) of the molecules are polar: .

Explanation:

Polar substances have their elements held together by a covalent bond that contain partially positive and negative charges, which results in a difference in the charges' electronegativity difference (usually ranging between 0.4 and 0.7).

PCl5 is non-polar with a symmetric geometryCoS is polarXeO3 is polar, with a trigonal pyramidal molecular geometricSeBr2 is polar as the difference their electronegativity is about ).5

The correct answer is d

They are all solids.