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Chemistry
A Level

Types of chemical bonds

Ionic bond- this is an electrostatic force of attraction between two oppositely charged ions, i.e. a positively charged ion and a negatively charged ion. 

Covalen...

Answered by Lizzie B. Chemistry tutor
13523 Views

What are Van Der Waals dispersion forces?

Van der Waals forces are a form of intermolecular (between molecules) force. 

A covalent bond is created by a shared pair of electons. (For example two chlorine atoms wil...

Answered by Zuhayr A. Chemistry tutor
5700 Views

How is benzene nitrated?

The nitration of benzene is an example of an electrophilic substitution reaction - where one of the hydrogens (or other group attached to the benzene ring) is removed and replaced by another group. The...

Answered by Lily C. Chemistry tutor
5552 Views

How do I calculate the Gibbs free energy change for a reaction when given the entropy change, enthalpy change and the reaction conditions>

deltaG= Gibbs free energy 

deltaG=deltaH - TdeltaS 

If deltaH= 150 kJ/mol and deltaS=2.1 J/mol we must first convert the deltaS into kJ/mol, this is done by multiplying by 1...

Answered by Archit M. Chemistry tutor
9478 Views

How do I predict the shape and bond angle of an molecule?

Electron pairs arrange themselves so they are as far apart as possible (electron pair repulsion theory). In a covalent compound, the number of electron pairs around the central atom determines the shap...

Answered by Tolu T. Chemistry tutor
14339 Views

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