[填空题]
A standard cylinder of oxygen usu o(v b8bqi/i-9c,mxued in a hospitit+d w1b, gf.val has gauge pressure = 2000 psi (13,800 kPa) anibtvgf .w,1+dd at T = 259K How long will the cylinder last if the flow rate, measured at atmospheric pressure, is constant at 2.4 L/min. $\approx$ hour