In a 250.0 g sample of ammonium sulfate, how many moles of ammonium ions are present?

1.89 mol

Explanation:

in 250 g of ammonium sulfate 1.89 moles are present

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