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First of all you have to draw the Lewis dot structure of the molecule. If the molecule is symmetrical, it's non-polar. If the molecule is non-symmetrical or asymmetrical, then the molecule is polar.

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βˆ™ 12y ago
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βˆ™ 13y ago

A molecule with a opposite charges on opposite ends

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βˆ™ 11y ago

methanol, ethanol

acetone, chloroform

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βˆ™ 9y ago

When a substance is polar, the electrons of the molecule are distributed evenly, more than if the substance is non-polar.

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βˆ™ 13y ago

See if it is soluble in water

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βˆ™ 14y ago

Water is a polar compound.

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Q: How to know if a substance is a polar or not?
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