Which of the following best describes the current age of the Sun? A.) It is near the end of its lifespan.

B.) It is about halfway through its lifespan.

C.) It is early in its lifespan.

D.) We do not have a good understanding of the Sun's age.

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.