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State the element in period 3 that has the highest melting point and explain your answer.

Silicon has a Chrystal structure with many covalent bonds between atoms. Covalent bonds are strong and need a large amount of energy to be broken in order to melt Silicon.
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Answered by Lily B. • Chemistry tutor
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What is hydrogen bonding and why does water have a higher boiling point than methanol?

Hydrogen bonding is an intermolecular interaction between a partially positively charged hydrogen atom on one molecule and a partially negatively charged atom on another molecule. The difference in charge is...
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Answered by Max Q. • Chemistry tutor
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Describe how to test for and identify halide ions in a solution.

First acidify the solution using dilute nitric acid, then add silver nitrate. The silver ions should react with the halide ions to form a precipitate, with colour depending on which halide ion is present:Chl...
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Answered by Connor C. • Chemistry tutor
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Write equations for the reaction of propanoic acid with methanol and name any organic products.

This reaction is the formation of an ester because the reactants are a carboxylic acid and an alcohol. Propanoic acid has 3 carbons and will have the functional group COOH: CH 3 CH 2 COOH Methanol has 1 carb...
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Answered by Bethan H. • Chemistry tutor
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Explain the reasons for the changes in reactivity of Phenol, Benzene and MethylBenzene

The changes in reactivity are due to the electron donating/withdrawing properties of the substituted groups. For example the OH group in Phenol is electron donating. This means the electron density of the de...
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Answered by Adam D. • Chemistry tutor
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