Question
Asked Sep 7, 2019

How can I know if a compound is non-polar just by looking at the name? Example: Ethanol, Propane, etc.

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Expert Answer

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Step 1

To know whether a compound is polar or not, we need to know the structure of the compound and the electronegativity difference of the atoms in the compound.

If the difference in electronegativity for the atoms is greater than 0.4, we consider it as polar. If the difference in electronegativity is less than 0.4, we consider it as non-polar.

Step 2

Example:

Propane (C3H8) is a non-polar molecule because carbon and hydrogen have similar electronegativities (2.5 for C and 2...

н
н
н
н-
н
н н
н
non-polar
Propane
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н н н н- н н н н non-polar Propane

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