Regents Chemistry Exam June 2024 Question 13
13 Which formula represents a molecule with an asymmetrical distribution of charge?
(1) Cl2
(2) CO2
(3) CH4
(4) H2O
Solution:
A polar molecular has an asymmetrical distribution of charge while a nonpolar molecule has a symmetrical distribution of charge. The question is asking for an asymmetrical distribution which would be for a polar molecule. A molecule that consists of two of the same elements such as Cl2 is nonpolar. A molecule where the central atom is attached to atoms of the same element and has no lone electrons is nonpolar as well. CO2 and CH4 are nonpolar molecules. Water is a polar molecule, Choice 4 is the correct answer.
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