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The passé composé (present perfect) is a frequently used tense to refer to a finished action, event, etc. in the near past. In spoken French, it often replaces the passé simple (past historic). It is a compo...

Firstly note that in general aldehydes are more reactive than ketones. This is a result of two effects: 1. Ketones are more sterically hindered. 2. Alkyl groups are electron donating and so reduce the partia...

Speed and velocity are both measurements of the rate of travel but their is a subtle difference. Speed tells us the rate at which an object is moving. Velocity tells us the rate at which an object is moving ...

A mass spectrometer is a piece of lab equipment used to measure the relative atomic masses of atoms and molecules. It is widely used to identify substances in the lab. The process is often automated and requ...

The experiment was not ethical as Milgrim did not obtain informed consent from his participants. This is required as all members taking part in an experiment must be aware of all aspects since they may not b...