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Chemistry
A Level

Why does the bromine become polarised in HBr during electrophilic addition

A C to C double bond has a high electron density. As the bromine gets close to the C=C bond the high electron density repels the electrons in the H-Br bond further towards the H making the H slightly n...

Answered by Richard C. Chemistry tutor
5757 Views

"Sulfur Dioxide can be represented as a sulfur atom with double bonds to each of two oxygen atoms, explain the shape of this molecule and predict the bond angle".

This molecule is v-shaped. There are three areas of electron density surrounding the central sulfur atom, these three areas of electron density repel as far apart as possible, explained by the VSEPR th...

Answered by Firat G. Chemistry tutor
5428 Views

Proton NMR Made Easier

Proton or 1H NMR can look complicated but with practice; there are techniques that can make the peak assignment a little easier.1. Make sure you count the proton environments correctly, if the ...

Answered by Martin L. Chemistry tutor
3603 Views

What is clonal selection?

Clonal selection is a part of human immune response where specific B or T-helper lymphocytes are chosen to undergo clonal expansion

B-lymphocytes and T-helper lym...

Answered by Oliver M. Chemistry tutor
41782 Views

What is the rate-determining step?

The rate-determining step is simply the slowest step in a reaction mechanism of a multi-step reaction. 

Most reactions do not happen in one simple step. You may be familiar with overall r...

Answered by Charlotte K. Chemistry tutor
2078 Views

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