January 2018 NY Regents Chemistry Exam
9 Which phrase describes the molecular polarity and distribution of charge in a molecule of carbon dioxide, CO2? (1) polar and symmetrical (2) polar and asymmetrical (3) nonpolar and symmetrical
(4) nonpolar and asymmetrical
Solution: CO2 has the following structural formula: O=C=O. It is a symmetrical molecule and is therefore nonpolar. Symmetrical molecules are nonpolar and asymmetrical molecules are polar.
Answer: 3
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