If the distance between the centres of the atoms of potassium and bromine in KBr molecule is 0.282 × 10-9 m, the distance of centre of mass of this two particle system from potassium is (mass of bromine = 80 u and of potassium = 39 u).

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9.3 × 10-2 nm

18.96 × 10-2 nm

27.9 × 10-2 nm

3.3 × 10-2 nm

answer is B.

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Detailed Solution

distance of CM from m1 is

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