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 Form 1 Chemistry Topical Questions and Answers on Air and Combustion

The diagram below represents a set-up that was used to show that part of air is used during burning.
(a) Given that phosphorus used was in excess, draw a diagram of the set-up at the end of the experiment(when there was no further observable change)
(b) Suggest one modification that should be made on the apparatus if the percentage of the air used is to be determined.

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