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Assignment Score: Glve Up? Hint 2572/5200 Resources Check Answer < Question 39 of 52> Consider this reaction involving an unknown element X. Br, +2 XF F2+2XBR When 7.500 g of XBr reacts, 4.324 g of Br, is produced. Calculate the molar mass of X, and then identify its element symbol. element symbol for X: g/mol molar mass of X: help terms of use contact us privacy policy about us careers

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o Given reaction having an unknown element X. F22XBR Br, 2XF oThe question is: when 7.500 g of XBr reacts, 4.324 g of Br2 is produced. o We need to calculate the molar mass of X and its symbol. is: 159.808 g/mol We know that, the molar mass of Br First, calculate the moles of Br2, Given mass of Br2 moles Br2 Molar mass of Br 4.324 gra Br2 159.808 gramm Br2/mol moles Br2 = 0.02705 75 mol From the given balanced chemical equation, the molar ratio of XBr and Br, is 2:1 that means the moles ofXBr =0.0270575 x 2 0.054115 mol XBr Now, 7.500 gram of XBr reacts, So, the molar mass of XBr will be, Grams XBr Molar maSs = Moles XBr 7.500 grams Molar masS = 0.054115 mol Molar mass 138.594 g/mol o We know that, the molar mass of Br is 80 g/mol. and we have the molar mass ofX is 138.594 g/mol. So (138.594- 80) g/mol 58.594 g/mol The molar mass of Nickel is 58.69 g/mol. Therefore the symbol for Xwill be Ni

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