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Describe how ethanol is produced from ethene.

Ethene is hydrated with steam in the presence of a catalyst.
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Answered by Lucy O. • Chemistry tutor
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What is a synapse and how does information pass across a synapse?

A synapse s a junction between two neurones. Neurotransmitters are relased from one neurone and diffuses across the synapse to stimulate the next neurone.
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Answered by Lucy O. • Biology tutor
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Describe the key features of the Truman Doctrine

The Truman Doctrine was created by President Truman in March 1947, in response to the perceived communist and authoritarian threat in Turkey and Greece. In a speech to Congress, Truman stated that "it m...
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Answered by Mary R. • History tutor
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Why did William the Conqueror succeed in the Battle of Hastings

Fortune, Energy, Leadership, Tactics. This anagram is the most useful way to remember how and why the Battle of Hastings was won by William the Conquerer. Although Harold Godwinson was in an advantageous pos...
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Answered by Hannah G. • History tutor
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Solve algebraically the simultaneous equations: x^2+y^2 = 25 and y-3x=13

To answer this question, we need to make y the subject of the second equation. We can do this through simple rearrangement: y-3x=13 so y=13+3x Now that we have y on its own, this means we can substitute for ...
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Answered by James K. • Maths tutor
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