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CGP EDU Academic Team
Published on: August 14, 2026
The volume of nitrogen gas (measured at STP) required to cover a sample of silica gel with a mono-molecular layer is 129cm 3 /g of gel. Calculate the surface area per gram of the gel if each nitrogen molecule occupies 16.2 × 10 –20 m 2 . (Report your answer after dividing by 10)
Text Solution
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CHECK THE SOLUTION.
56
Sol. Surface area per gram of silica gel = area occupied by each N 2 × no. of N 2 molecules
= 16.2 × 10 -20 × 
= 560m 2
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