A hydrate of cocl2 with a mass of 6.00g is heated strongly. After cooling, the mass of the anhydrate is 3.27 grams. Write the equation for the conversion of the CoCl2 hydrate to the anhydrate

)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.

Convert .347 kilometers to miles show your work

How many atoms or molecules are there in a mole of a substance?