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A student used the set up shown in the diagram below in order to study the reactions of some metals with steam. The experiment was carried out for ten
minutes.
(a) What observation would be made if gas F is ignited?
(b) When the experiment was repeated using iron powder instead of magnesium ribbon, very little gas F was obtained.
(i) Give a reason for this observation
(ii) What change in the conditions of the experiment should the student have made in order to increase the volume of gas F produced?