Iron filings are placed in powdered sulfur. Both iron and sulfur are elements. The iron and
sulfur are stirred together until they reach a uniform composition. Then the iron filings are
removed from the sulfur with the use of a magnet. What type of substance is the iron and
sulfur combination?

A. A pure substance
B. A compound
C. An element
D. A mixture

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

the answer to this question is 3.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.