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First we need to calculate the total mass of a CO₂ molecule. This is done by summing up the individual masses of all the atoms. To find these, we look at the periodic table and see that the mas...

This is a really common pitfall, because it is tempting just to tell the examiner everything you know and get carried away telling the story. I find the best way to avoid this is to really think about and...

The electrons in chlorine are further away from the nucleus and in a higher energy level (3p for chlorine as apposed to 2p for fluorine). Chlorines electrons are better shielded and so feel less nuclear c...

This is a broad question which allows the candidate to show how they are aware of and possess the desirable qualities of a doctor. They can also be used to bring out effective coping strategies to ensure ...

Start by reading it multiple times, because the meaning of a passage or a poem can be tricky to grasp on a first reading, no matter how much you know about literature. The excerpt you're looking at will h...