Consider a balloon with a volume V it contains inversion Casanovas in internal pressure P the temperature of the gas is T and 75T diffusers pressures of P which of these could be the final volume of the balloon

the answer is c. nacl

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but