Why the formula mass for an ionic compound may not correctly be referred to as a molecular mass.

here's the link to your question!

explanation:

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

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