Which statement correctly describes protons? A. They have no charge and are present in the nucleus of an atom.
B. They have a negative charge and travel around the nucleus of an atom.
C. They have a positive charge and travel around the nucleus of an atom.
D. They have a positive charge and are present in the nucleus of an atom along with the neutrons.

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

Why is nh3 classified as a polar molecule

)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.