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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.
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(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?