An arctic weather balloon is filled with 10.2L of helium gas inside a prep shed. The temperature inside the shed is 9°C. The balloon is then taken outside, where the temperature is -21°C. Calculate the new volume of the balloon.

One does not belong why? ice, gold ,wood ,diamond and table salt

What is the molar mass of a gas that has density of 2.054 g/l

)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.