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Transcription of this question: 4.Rhenium, Re, was the last element with a stable isotope to be isolated.(a)(b)(c)Before its isolation, scientists predicted the existence of rhenium and some of its properties.Suggest the basis of these predictions.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.One chloride of rhenium has the empirical formula ReC[3.[2][2]0)(ii)State the name of this compound, applying IIJPAC rules.Calculate the percentage, by mass, of rhenium in ReC13.[2]

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