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Study the set-up below and answer the questions that follow.

a).Between N and M which part should be heated first? Explain
b) Write a chemical equation for the reaction occurring in the combustion tube.

Answer Text:
a).N, So that the heat can turn water into steam which reacts with the iron powder.
b)#H_2 O_(g) + Fe_(s) -> FeO(s) +H_(2(g))#