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Define a mole of a substance.
(2005)
What is meant by the term addition polymerisation? .
Account for the inert nature of nitrogen gas.
An experiment was carried out to determine the percentage water of crystallisation and the degree of water of crystallisation, x, in a sample of hydrated sodium carbonate crystals (Na2CO3.xH2O).
(2006)
A sample of soap was prepared in the laboratory by refluxing a mixture of approximately 5 g of animal fat, 2 g of sodium hydroxide pellets (an excess) and 25 cm3 of ethanol in an apparatus like that drawn on the right.
