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PV=nRT P is the pressure that you are looking for V is the volume of the vessel (74.48ft3) R is a constant. look it up. (10.7316 ft3 psi/R lbmol) 4 cubic meter of air is the amount of moles that you have (n) (.026853 cubic meters is 0.0026412Lbmole) this is 0.393430901 lbmol I will assume the air at 120 degrees F that is = 579.7 degrees Rankin P= (.39)(10.7316)(579.7)/74.48ft3 P= 32.57 psi

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Q: The volume of vessel is 2 cubic meter that contain 4 cubic meter of air how to find the pressure in side the vessel?
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