Ahowler monkey is the loudest land animal and under some circumstances, can be heard up to a distance of 5.0 km. assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0*10^-12 w/m^2. the acoustic power emitted by the howler is closest to a) 3.2 mw b) 0.11 mw c) 11 mw d) 1.1 mw e) .31 mw

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.