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JEE Main Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main

Given that the abundances of isotopes Fe, Fe and Fe are 5%, 90% and 5%, respectively, the atomic mass of Fe is

Answer: (B)

Solution

Average atomic mass \dfrac{54×5+56×90+57×5}{100}\dfrac{270+5040+285}{100}$=55.

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Question ID VK-130499