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Given that the abundances of isotopes Fe^54, Fe^56, Fe^57 are 5%, 90% and 5% respectively, the atomic mass of iron is

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Given that the abundances of isotopes Fe54, Fe56, Fe57 are 5%, 90% and 5% respectively, the atomic mass of iron is 

(A) 55.85 

(B) 55.95 

(C) 55.75 

(D) 56.065 

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1 Answer

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Best answer

Correct option: (B) 55.95

Explanation: 

(54 x 0.05) + (56 x 0.9) + (57 x 0.05) = 55.95 

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