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Explain the delocalised model of benzene, and hence why it is less reactive with electrophiles than cyclohexene

Benzene consists of a ring of 6 carbon atoms bonded to each other by sigma bonds from the overlap of s orbitals.p orbitals above and below the ring overlap to form a delocalised pi system with rings of el...

Answered by Archie W. Chemistry tutor
10667 Views

Outline and evaluate the multi-store model of memory.

The multi-store model was developed by Atkinson and Shiffrin (1968) in order to make the distinction between the separate stores of memory; the sensory, short term and long term. Sensory memory is charact...

Answered by Megan L. Psychology tutor
36264 Views

A curve has equation -2x^3 - x^2 + 20x . The curve has a stationary point at the point M where x = −2. Find the x-coordinate of the other stationary point of the curve.

Lets think about what stationary points actually mean. A stationary point of a curve is where the gradient is equal to 0. Illustrate by plotting the graph of y = x^3.We know that by differentiating the eq...

Answered by Torty S. Maths tutor
2549 Views

Explain three ways in which the structure of the xylem vessels makes them well-adapted to their function.

The end walls are removed from each end, forming an uninterrupted tube, so water can pass through easily.Their walls are thickened with a woody substance called lignin, w...

Answered by Hannah W. Biology tutor
43477 Views

Explain the macroeconomic effects of tariffs

effects on balance of trade, growth, inflation, employment...what do these effects depend upontariff graphmarshall-lerner conditionall that good stuff :)

Answered by Alexander B. Economics tutor
1029 Views

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