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What chemical test can be used to differentiate between alkenes and alkanes. Describe and explain the results.

Alkenes decolourise bromine water (orange/brown to colourless) while alkanes cause no change in colour. An electrophilic addition reaction occurs with the alkene. In a reaction between et...

SE
Answered by Sito E. Chemistry tutor
12591 Views

Sketch the graph of f(x) = sin(x). On the same set of axes, draw the graph of f(x)+2, f(2x) and f(-x). By observing your graphs of f(x) and f(x), if f(a)=1, what is the value of f(-a)?

The first stage is the simple drawing of the sin graph. (could be done on the whiteboard)Then it is a typical A-Level style question to perform three types of transformations on that graph, here we have 1...

JG
Answered by Jessica G. Maths tutor
3824 Views

Explain two causes of ageing populations in MEDCs

One cause of ageing populations in certain MEDCs is improved access to healthcare. Improved access to healthcare allows individuals to receive treatment more promptly, assisting in stopping preventable il...

JP
Answered by Jools P. Geography tutor
3536 Views

What methods did Lenin use to consolidate Bolshevik Power October-December 1917?

What the question wants: 1) 'methods used' - so it each part of the argument must be an active decision/ policy taken by Lenin 2) 'October/ December 1917' - Therefore if doing a theme on international wit...

AL
Answered by Alex L. History tutor
2013 Views

Explain two causes of ageing populations in MEDCs

One cause of ageing populations in certain MEDCs is improved access to healthcare. Improved access to healthcare allows individuals to receive treatment more promptly, assisting in stopping preventable il...

JP
Answered by Jools P. Geography tutor
1842 Views

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