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Chromatography is widely used in chemistry as a separation technique
(2008)
Hydrogen peroxide solution is an oxidising reagent. Draw or describe the warning symbol put on a container of hydrogen peroxide solution to indicate this hazard
Write the electron configuration (s, p, etc.) of the aluminium ion (Al3+)
Define electronegativity.
The hydrocarbon molecules in petrol typically contain carbon chains with between five and ten carbon atoms. The most widely used petrol in Ireland has an octane number of 95
