If the river flows at an average rate of .145 cubic feet per second, what is the additional concentration of nitrogen in the river water due to the farmer fertilizer each year

What is the relation between concentration of reactants and the rate of chemical reaction?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

)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.