Asked by PCHS
Consider this reaction involving an unknown element X. F2+2XBr = Br2+2XF When 5.200 g of XBr reacts, 2.896 g of Br2 is produced.
Calculate the molar mass of XBr in g/mols?
What is the element symbol for X?
I know that I need to convert grams of Br2 to moles and I have done that. I just don't know how to continue on to the next step.
Calculate the molar mass of XBr in g/mols?
What is the element symbol for X?
I know that I need to convert grams of Br2 to moles and I have done that. I just don't know how to continue on to the next step.
Answers
Answered by
DrBob222
So you have approx 0.018 mols Br2. That means twice that for mols XBr so 0.036.
Since mol = g/molar mass then molar mass = g/mol = 5.20/0.036 = approx 144. Subtract atomic mass Br from that to find the atomic mass of X and identify from the periodic table. I would look in the 3d element series.
Since mol = g/molar mass then molar mass = g/mol = 5.20/0.036 = approx 144. Subtract atomic mass Br from that to find the atomic mass of X and identify from the periodic table. I would look in the 3d element series.
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