Answer:
D.) the density changed
Explanation:
This would be the answer because it is a specific amount of Nitrogen undergoing a physical change. Since the color and boiling point don't influence a change in volume, those are ruled out. Also, nitrogen's molecular mass never changes, so that would not make sense either. But if the density, which is mass/volume, has changed (more specifically decreases) then it means the volume has increased.
Hope this helps.
The answer is nickel sulfate hexahydrate.
The chemical name of the substance is nickel sulfate hexahydrate.
Emerald-green crystals of the substance are used in nickel plating. The chemical name of this compound nickel sulfate hexahydrate.
This substance is used in nickel panting and it is having chemical name that is nickel sulfate hexahydrate.
