The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?

What does x represent in the formula for the compound xcl4?

)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.

How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso