Alayer of toluene 7.5 mm deep lies at the bottom of an open rectangular tank-a of 1.5x2 m. the tank temperature is 25 °c and diffusivity of toluene in air is 6.5x10 m2/s at this temperature. if the vapor pressure of toluene in the tank is 14.5 kn/m2 and the diffusion may be assumed to take place through a stagnant film of 3 mm thick, how long will it take for the toluene to evaporate? the density of toluene is 910 kg/m' if tank-b contains similar amount of mass of toluene, and has a dimensions of 3x5 m, how long will it take for the toluene to evaporate. comment on the results

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

a is the answer to this question

explanation:

the awnser is group 12