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Chemistry

A Level

Explain the term 'homologous series'

A homologous series refers to a group of chemical compounds which share the same functional group, but vary in another sense, such as by the length of the alkyl chain to which the functionality is attache...

Answered by Tom O. • Chemistry tutor

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What is the mechanism for the nucleophilic substitution of a halogenoalkane?

A halogenoalkane is a saturated hydrocarbon chain with a halogen atom (F, Cl, Br or I) attached to a carbon instead of a hydrogen. Halogens have a greater electronegativity than carbon. This means they dr...

Answered by Charlotte S. • Chemistry tutor

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What is a mole?

A mole is the amount of a substance which contains as many particles (atoms, ions, molecules etc) of the substance as there are carbon atoms in 12g of ¹²C - this is exactly 6.02 × 10²³

Answered by Molly N. • Chemistry tutor

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What are the differences between sigma and pi bonds?

A sigma bond can be between s or p orbitals whereas a pi bond can only be between p orbtials

In signma bonds, atomic orbitals overlap along bonding axis, in pi bonds atomic orbitals overlap above a...

Answered by Philip K. • Chemistry tutor

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Explain the structure and characteristics of benzene

Initally, benzene was thought to have the kekule structure. This was thought to be an interconversion of two different discrete strucutres of a 6 carbon ring with single and double bonds. However there we...

Answered by Daniella P. • Chemistry tutor

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