18.31 Oxygen (O) has a molar mass of 32.0 g/mol. What is (a) the average translational kinetic energy of an oxygen molecule at a tempera- ture of 300 K; (b) the average value of the square of its speed; (c) the root- mean-square speed; (d) the momentum of an oxygen molecule traveling at this speed? (e) Suppose an oxygen molecule traveling at this speed bounces back and forth between opposite sides of a cubical vessel 0.10 m on a side. What is the average force the molecule exerts on one of the walls of the container? (Assume that the molecule's velocity is perpendic- ular to the two sides that it strikes.) (f) What is the average force per unit area? (g) How many oxygen molecules traveling at this speed are neces- sary to produce an average pressure of 1 atm? (h) Compute the number of oxygen molecules that are contained in a vessel of this size at 300 K and atmospheric pressure. (i) Your answer for part (h) should be three times as large as the answer for part (g). Where does this discrepancy arise? ..

coukd you help me with part e and forward?

18.31 Oxygen (O2) has a molar mass of 32.0g/mol. What is (a) the average translational kinetic energy of an oxygen molecule at a temperature of 300K; (b) the average value of the square of its speed; (c) the rootmean-square speed; (d) the momentum of an oxygen molecule traveling at this speed? (e) Suppose an oxygen molecule traveling at this speed bounces back and forth between opposite sides of a cubical vessel 0.10m on a side. What is the average force the molecule exerts on one of the walls of the container? (Assume that the molecule's velocity is perpendicular to the two sides that it strikes.) (f) What is the average force per unit area? (g) How many oxygen molecules traveling at this speed are necessary to produce an average pressure of 1atm ? (h) Compute the number of oxygen molecules that are contained in a vessel of this size at 300K and atmospheric pressure. (i) Your answer for part (h) should be three times as large as the answer for part (g). Where does this discrepancy arise