Question

Two solid samples each contain sulfur, oxygen, and sodium, only. These samples have the same color, melting point, density, and reaction with

an aqueous barium chloride solution. It can be concluded that the two samples are the same
(1) compound (3) mixture
(2) element (4) solution

Answer 1

The correct answer is 1. compound. There are three elements and not just one so it's not element. Mixtures wouldn't have the same properties that you described but these do so it's a compounds. Solution is not a solid thing but rather a liquid one. The two samples are therefore compounds.