Answer:
NaS2 has two elements within: Sodium & Sulfur.
Basically, the mass percentage of Na2S is:
Sodium = 58.914%
Sulfur = 41.086%
In total, that would equal: 100%.
Explanation:
Well, we know this because Na (Sodium) has 2 atoms & Sodium has no number after it so, that would be an ordinary one atom.
So, knowing that there are more Sodium's than Sulfur, the mass percentage would be higher, than the percentage of Sulfur.
