Questions and Answers
Is HF (hydrogen fluoride) polar or nonpolar?
Is H2O (water) polar or nonpolar?
Is NH3 (ammonia) polar or nonpolar?
Is HCl (hydrogen chloride) polar or nonpolar?
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Is PCl3 (phosphorous trichloride) polar or nonpolar?
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Is C (pure unbonded carbon) polar or nonpolar?
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Is H2S (hydrogen sulfide) polar or nonpolar?
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Is CCl4 (carbon tetrachloride) polar or nonpolar?
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Is NaCl (sodium chloride) polar or nonpolar?
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Is I2 (molecular iodine) polar or nonpolar?
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Is CH3OH (methanol) polar or nonpolar?
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Are all molecules with formula types like N2, H2, O2, CO2, Cl2 polar or nonpolar?
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Is CH3Cl (chloromethane) polar or nonpolar?
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Is C6H12O6 (glucose) polar or nonpolar?
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Is CH3CH2OH (ethanol) polar or nonpolar?
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Is CH3COOH (acetic acid) polar or nonpolar?
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Are noble gases polar or nonpolar?
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Is C6H6 (benzene) polar or nonpolar?
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Is CH4 (methane) polar or nonpolar?
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Is BF3 (boron trifluoride) polar or nonpolar?
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Is SF6 (sulfur hexafluoride) polar or nonpolar?
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Is C6H14 (hexane) polar or nonpolar?
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Is C2H2 (acetylene) polar or nonpolar?
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Study Notes
Polar Molecules
- HF (hydrogen fluoride) exhibits polarity due to the high electronegativity of fluorine, creating a dipole moment.
- H2O (water) is a highly polar molecule, essential for its solvent properties and ability to form hydrogen bonds.
- NH3 (ammonia) is polar, characterized by a nitrogen atom with a lone pair, leading to a distinct dipole.
- HCl (hydrogen chloride) is polar because it possesses a significant electronegativity difference between hydrogen and chlorine.
- PCl3 (phosphorous trichloride) is polar due to an asymmetrical shape and the electronegativity of chlorine.
- H2S (hydrogen sulfide) is polar because of the electronegativity difference between hydrogen and sulfur, resulting in a bent geometry.
- CH3OH (methanol) is polar owing to the hydroxyl group (-OH) that creates a strong dipole.
- CH3Cl (chloromethane) is polar due to the electronegativity of chlorine affecting molecular symmetry.
- CH3CH2OH (ethanol) is a polar molecule, which also contains a hydroxyl group, enabling hydrogen bonding.
- CH3COOH (acetic acid) is polar with a functional carboxyl group contributing to its polarity.
Nonpolar Molecules
- Pure unbonded carbon (C) is nonpolar as there are no differences in electronegativity.
- CCl4 (carbon tetrachloride) is nonpolar due to its symmetrical tetrahedral shape, resulting in cancellation of dipoles.
- I2 (molecular iodine) is nonpolar, as it is composed of two identical atoms sharing electrons equally.
- Molecules like N2, H2, O2, CO2, and Cl2 are nonpolar; they consist of the same element or have symmetrical arrangements.
- C6H12O6 (glucose) is mistakenly noted as nonpolar; it is in fact polar due to multiple hydroxyl groups.
- Any noble gas is inherently nonpolar because of a complete valence shell and lack of bonds.
- C6H6 (benzene) is nonpolar owing to its symmetrical ring structure despite having C-H bonds.
- CH4 (methane) is nonpolar due to its symmetrical tetrahedral geometry.
- BF3 (boron trifluoride) is nonpolar because of its trigonal planar symmetry, leading to balanced charge distribution.
- SF6 (sulfur hexafluoride) is nonpolar, with an octahedral structure that cancels dipole moments.
- C6H14 (hexane) is nonpolar, a straight-chain hydrocarbon with a symmetrical structure.
- C2H2 (acetylene) is nonpolar; it has a linear structure and symmetrical electron distribution.
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Description
Test your knowledge on molecular polarity with these flashcards. From hydrogen fluoride to ammonia, determine which molecules are polar or nonpolar. Perfect for chemistry students looking to reinforce their understanding of molecular behavior.
