Answer:
sulfur promotes oxide-reduction reactions.
Explanation:
In stagnant water, some solutes tend to precipitate. When Sulfur precipitate and touch a metal, Sulfur is being reduced and the metal is oxidated. This depends of potential redox of each element.
2-butane is the correct answer
Analytical chemistry studies and uses instruments and methods used to separate, identify, and quantify matter
Answer: They're called Periods
