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Describe why phenol reacts more readily with bromine than benzene does.

(labelled diagrams of both benzene and phenol would be used to show the overlapping p orbitals above and below the plane of the molecule, with phenol showing the partial delocalisation of the oxygen lone pai...
AJ
Answered by Abigail J. • Chemistry tutor
10100 Views

Find the stationary point of the function f(x) = x^2 +2x + 5

We can find stationary points of functions by using differentiation, we start this by assessing each term individually, we start with the first term x 2 , we first start by taking the power term (2 in this c...
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Answered by Henry O. • Maths tutor
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Rule of thumb for preterite past tense (regulars)

Use quizlet: http://quizlet.com/32347411/rule-of-thumb-spanish-preterite-tense-regular-ar-verbs-flash-cards/ http://quizlet.com/32348383/rule-of-thumb-spanish-preterite-regular-er-and-ir-verbs-flash-cards/ F...
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Answered by Elisa G. • Spanish tutor
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œintegrate xe4x in respect to x

1/4xe^4x-1/16e^4x +c
MA
Answered by M A. • Maths tutor
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The point on the circle x^2+y^2+6x+8y = 75 which is closest to the origin, is at what distance from the origin? (Taken from an MAT paper)

This is a good example of a question where intuition about geometry is important. Completing the square is a standard A level practice to find the equation of a circle. Doing this we get (x+3) 2 -9 +(y+4) 2 ...
JM
Answered by Jack M. • Maths tutor
7846 Views