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How can crude oil be used as a source of hydrocarbons?

Crude oil is a natural mixture of many different hydrocarbons. These hydrocarbons can be separated using a process known as fractional distillation .The crude oil is heated in a fractioning column allowing t...
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Answered by Thomas W. • Chemistry tutor
5422 Views

What are some good Spanish idioms to include in my research essay?

Although it depends what your research essay is on (i.e. you can't use the same idioms if you are writing an essay on a novel character and on a historical event), there are a few good ones that can be used ...
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Answered by Vittoria S. • Spanish tutor
24061 Views

How can I revise for my listening exam?

Besides doing past papers, which is the obvious answer, there are a couple of things you could do that I found useful. 1. Doing other exam boards' past papers, including the official DELE ones. In many cases...
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Answered by Vittoria S. • Spanish tutor
4900 Views

How can I memorise criticisms if I don't know the exam question?

At first, this seems like something hard to do. However, when you think about it, you realise it's just the same as knowing which quotes to memorise in a closed book exam. The easiest way to go about doing t...
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4925 Views

How do I practice writing an essay in the timed conditions?

This is usually what everybody worries about, as everyone can write a great essay if they have 6 hours available, but when it comes to writing an essay that you are completely proud of in 2 hours or less, it...
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