I have taught Chemistry for over 20 years. There are many resources on here that cover GCSE, IGCSE, A level and IB Chemistry.
Last updated
10 June 2013
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explains how to collect a gas for testing, depending on its density
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Empty reply does not make any sense for the end user
Empty reply does not make any sense for the end user
Empty reply does not make any sense for the end user
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