If the mass for the anhydrous salt MgSO4 is 0.9g, its molar mass being 120g/mol and the mass for the water removed is 1.1g. What is the mole of water that was in the hydrated salt?

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

)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.

What is the average rate of the reaction between 10 and 20 s?