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What does achiral mean?

Answer 1

It means superposable on its mirror image.

A chiral species, such as hands, shoes, gloves, and some molecules, cannot be superimposed on its mirror image; on the other hand, an achiral species, such as many molecules, can be superimposed on its mirror image because of their achiral, or not handed, geometry.

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Answer 2

Easton Jones

Achiral means that a molecule or object does not possess chirality, meaning it lacks a chiral center or symmetry elements that result in non-superimposable mirror images.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.