bro people are supposed to be taught at a young age not to bully or body shame or cat call ppl bc of there apperance. i wasnt taught at all and still know not to do that, what does that say abt them as a person, its rlly a shame, your all beautiful no matter what u look like <3

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?