The dibromide is completely converted to the dichloride when it is heated in a stream of chlorine according to the equation
XBr2 + Cl2 --> XCl2 + Br2
When 1.500g of XBr2 is treated, 0.890g of XCl2 results.
(a) Calculate the atomic mass of the element X.
(Br2 = 159.8 grams/mol,
Cl2 = 70.906 grams/mol)
2006-09-25 13:04:41 · 1 answers · asked by Phu N 2 in Science & Mathematics ➔ Chemistry
The ratios of the molar masses of the compounds must be constant.
mm XBr2
------------------
mm XCl2
Therefore, if "x" is the molar mass of element X
.
(x + 159.8 g/mol) 1.500 g
-------------------------- = -----------
(x + 70.906 g/mol) 0.890 g
Solve for "x". I get x = 58.79 g/mol.
2006-09-26 09:08:22 · answer #1 · answered by wibblytums 5 · 0⤊ 0⤋