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'Le', 'la', 'les' is used when you are asking or describing something in particular.

"Can I have the blue pen?" - "Est-ce que je peux avoir LE stylo bleu?" - You only ...

Explanation:

Both "tu" and "vous" mean "you" but "tu" is used for the singular of "you" and "vous" is used in two cases:...

Ecological validity is the extent to which research, or findings from an experiment, can be applied to real-life settings - i.e. the "real world".

Lab studies often lack ecologi...

A molecule will exhibit optical isomerism if it contains a chiral centre/ an asymmetric carbon atom - in other words, if it contains a carbon atom wit...

Covalent compounds contain atoms that share electrons - for example, hydrogen chloride (HCl) share electrons (one from each atom), in order to achieve a full set of 8 electrons in their outer ...