So scientist around the world can share there info without having to convert and doing extra work.
The gas is NH₃.
H₂ doesn't dissolve readily in water, SO₂ gives an acidic solution in water.
The solid residue is Fe(OH)₂.
FeSO₄ and Na₂SO₄ are soluble in water.
The answer is C.
Answer: 1436 mL
Explanation: 4/3 • 3.14 • 7^3 <— calculate