Final answer:
Ammonium sulfate is (NH4)2SO4, magnesium nitride is Mg3N2, aluminum oxide is Al2O3, and calcium carbide is CaC2.
Step-by-step explanation:
The formula for ammonium tetraxo sulfate (VI) is typically known as ammonium sulfate, and its chemical formula is (NH4)2SO4. The formula for magnesium nitride is Mg3N2, which involves a combination of magnesium and nitrogen. The compound aluminum oxide has the formula Al2O3, consisting of aluminum and oxygen atoms. Lastly, calcium carbide has the formula CaC2, a compound of calcium and carbon.