N:
Calculate the mass percent of each element in Na2S.

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.

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.