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Question
Solve problem:
Calculate the number of an atom of the following (Given: Atomic mass of I = 127 u).
254 u of iodine (I)
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Solution
254 u of iodine (I) = x atoms
Atomic mass of iodine (I) = 127 u
∴ Mass of one iodine atom = 127 u
∴ x = `(254 "u")/(127 "u")` = 2 atoms
Number of iodine atoms in 254 u = 2 atoms
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