You are less likely to see a total solar eclipse than a total lunar eclipse because
a. the moon’s shadow covers all of earth during a solar eclipse.
b. new moon phases occur less often than full moon phases.
c. only people on the daytime side of earth can see a solar eclipse.
d. the moon’s umbra only covers a small area on earth’s surface.

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.