22.5-5. steam stripping and number of trays. a relatively nonvolatile hydrocarbon oil contains 4.0 mol % propane and is being stripped by direct superheated steam in a stripping tray tower to reduce the propane content to 0.2%. the temperature is held constant at 422 k by internal heating in the tower at 2.026 × 105 pa pressure. a total of 11.42 kg mol of direct steam is used for 300 kg mol of total entering liquid. the vapor–liquid equilibria can be represented by y = 25x, where y is mole fraction propane in the steam and x is mole fraction propane in the oil. steam can be considered as an inert gas and will not condense. plot the operating and equilibrium lines and determine the number of theoretical trays needed. ans. 5.6 theoretical trays (stepping down from the tower top)

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be