A piece of sandston with a bulk volume of 13 cc is, Ask an Expert

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A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature ismaintained constant and the cell is opened to another evacuatedcell the same volume. The final pressure in the two vesselsis 334.7 mm Hg. What is the porosity of the sandstine?

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