Answer to Question #129499 in General Chemistry for althea

Question #129499

Bex₂have a formula mass of 262.8 g/mol. determine the element of x.

Expert's answer

Let Atomic Mass of element x is A .

So , molar mass of BeX₂ = 9 + 2A .

9 + 2A = 262 .8

So , A = 126 .9 = 127 g / mol

So This is "IODINE ( I ) ."

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