5. Why did you categorize the reactions the way you did? What do your physical reactions have in common? What do your chemical reactions have in common?​

Why do cells appear different in distilled water than they do in 10% salt water?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Why is the bottom layer of a trophic pyrimid the