Which factors can affect the amount of friction acting on an object on a solid surface? a. the weight of the object and the force of a push
b. the type of surface and the weight of the object
c. the force of a push and the motion of the object
d. the motion of the object and the type of surface mark this and return

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.