What process separates a proto star from a fully formed star? 1. Size and temperature
2. Nuclear fission
3. Brightness and color
4. Nuclear fusion

At stp, what is the volume of 1 mole of co2?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

)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.