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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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A spherical ball of radius 7 cm7 \mathrm{~cm} contains 56%56 \% iron. If density is 1.4 g cm−3,1.4 \mathrm{~g} \mathrm{~cm}^{-3}, number of moles of Fe\text{Fe} present approximately is
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Correct option: C
20
Option C (20) is correct because it is calculated based on the volume of the sphere, density, percentage of iron, and the molar mass of iron.

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