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What is a mole?

A mole is simply a number, an amount of something. Like when people refer to a dozen of eggs they mean 12 eggs, when someone says a mole of atoms they mean 6.022 x 10²³ atoms. A m...

Answered by Charlotte H. • Chemistry tutor

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How do each of ionic, covalent and metallic bonding compare?

To begin, it is important to note that each of these three types of bonding ...

Answered by Alia A. • Chemistry tutor

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Where does the water come from that is given off when making an ester?

One hydrogen (-H) from the alcohol group (-OH) on the alcohol breaks off and joins with the alcohol (-OH) group that breaks off of the carboxylic acid (-COOH).

So the -H from alcohol joins the...

Answered by Hannah P. • Chemistry tutor

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Define the "standard enthalpy change of atomisation".

This is a standard definition question that is relatively common in A level papers.

Answered by Daniel G. • Chemistry tutor

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What is an ionic bond?

An ionic bond is an electrostatic interaction between a cation(positive) and an anion(negative). These bonds are formed when a metal forms a compound with a non-metal.

Metals lose electrons an...

Answered by Olivia P. • Chemistry tutor

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