The langmuir modelconsider a vapor of atom in equilibrium with atoms adsorbed to a surface. as atoms from a vapor phasebecome bound to a surface, they are restricted to discrete sites and are not free to move. each of the sitesoccupies an area a1 for a total of ns = a/a1 possible binding sites. only one atom can occupy each site. the binding energy for an atom on the surface is −ε0 . the mass of the atoms is m and both the surface andvapor are held at temperature τ.a) find the partition for the system of adsorbed atoms as a function of the number of adsorbed atoms z(nad ).b) calculate the chemical potential of the adsorbed atoms. c) use your expression for the chemical potential to find the equillibrium presure of the vapor as a functionof the number of adsorbed atoms nad /ns .

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?