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A toy balloon originally held 1.0 gm of ...

A toy balloon originally held 1.0 gm of He gas and had a radius 10 cm. During the night , 0.25 gm of the gas effused from the balloon. Assuming ideal gas behaviour , under these constant P andT conditions, what was the radius of the balloon the next morning.

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The correct Answer is:
9.08 cm
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MOTION-GASEOUS STATE -EXERCISE-3
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