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Transcription of this question: 4.Rhenium, Re, was the last element with a stable isotope to be isolated.(a)(b)The stable isotope of rhenium contains 110 neutrons.State the nuclear symbol notation for this isotope.Before its isolation, scientists predicted the existence of rhenium and some of its properties.(i) Suggest the basis of these predictions.[2](ii)(iii)A scientist wants to investigate the catalytic properties of a thin layer of rheniummetal on a graphite surface.Describe an electrochemical process to produce a layer of rhenium on graphite.Predict two other chemical properties you would expect rhenium to have, givenits position in the periodic table.(c)Describe how the relative reactivity of rhenium, compared to silver, zinc, and copper,can be established using pieces of rhenium and solutions of these metal sulfates.[2][2][2](d)One chloride of rhenium has the empirical formula ReCt3.0)(ii)State the name of this compound, applying IIJPAC rules.Calculate the percentage, by mass, of rhenium in ReC[3.[2]Rhenium forms salts containing the perrhenate(Vll) ion, Re04-(i) Suggest why the existence of salts containing an ion with this formula could bepredicted. Refer to section 6 of the data booklet.(ii) Deduce the coefficients required to complete the half-equation.H* (aq) +Req- (aq) +H20(l)EO = +0.36V(iii) Predict, giving a reason, whether the reduction of Re04- to wouldoxidize Fe2* to Fe3* in aqueous solution. Use section 24 of the data booklet.

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