5. The formula for a compound that contains an unknown non-metallic element is (NH4)2X. The molar mass of the whole compound is 68.17 g/mol. What is the molar mass of X and identify X.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

it is the most commonly accepted one

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.