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NaOH has a high melting point and conducts electricity in solution. H2O has a low melting point and does not conduct electricity. Explain, using the structure of each, why this is the case.

NaOH is an ionic compound with strong electrostatic attraction between the oppositely charged ions . This means the melting point is high, as the bonds need a lot of energy to overcome. When dissolved, the i...
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Answered by Sophie T. • Chemistry tutor
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I've heard that interviewers ask strange, out-of-the-blue questions to catch students off-guard. How do I circumvent this?

Ultimately, all tutors are trying to do in interviews is determine how well you would fit in in the Oxbridge teaching environment - an environment that is designed to challenge you and push you to the limits...
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Suggest why the concentration of sodium hydroxide in a solution slowly decreases when left open to air

NaOH reacts with carbon dioxide in open air
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Answered by Adam K. • Chemistry tutor
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Explain how an activated oestrogen receptor affects the target cell?

The activated oestrogen receptor binds to the promoter region of the specific gene. It then stimulates RNA polymerase to transcribe the gene, thus increasing transcription.
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Answered by Adam K. • Biology tutor
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Differentiate the equation x^2 + 2y^2 = 4x

2X + 4Y (dy/dx) = 4 4Y (dy/dx) = 4 - 2X dy/dx = (4 - 2X) / 4Y
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Answered by Adam K. • Maths tutor
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