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Why does phenol react more readily with bromine than benzene?

The oxygen on the OH (of the phenol) has a lone pair which it donates into the delocalised pi system of the ringThis activates the ring and there is now a high electron density.This is now strong enough to p...
LK
Answered by Leah K. • Chemistry tutor
3890 Views

Where does the formula for gravitational potential come from? Why the minus sign?

We know Newton's Law of Gravitation , which states that the force F between two bodies of masses M and m respectively, separated by distance R, can be given by: F = GMm/R 2 where G is the gravitational const...
KM
Answered by Kieren M. • Physics tutor
9455 Views

Explain why a polymer may be more suitable for bottles than glass

Polymers such as PET have various properties such as being flexibility, lighweight and good strenght to weight ratio that allow them to be ergonomically used by consumers. Polymers are also able to be pigmen...
AL
2447 Views

Explain the possible negative externalities that might arise from the increased use of cars (10 marks)

Negative externalities are caused either by the consumption or the production of a good or service. The use of cars results in the creation a negative externality of consumption, which is defined as an exter...
JW
Answered by Joseph W. • Economics tutor
18115 Views

How do you write a close analysis for an extract from a Shakespeare play?

Close analysis questions at A Level English require a lot of detailed attention to the text provided. In the extract based questions, examiners are looking for detailed understanding of language and its effe...
HB
Answered by Helena B. • English tutor
5426 Views