ا جای خالی را با کلمات مناسب کنید.
) به موادی که دارای اتم های مختلف اما ذرات یکسان می باشد می
گویند.
نا.
می >
اسم

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

)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.

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released