select the correct answer. in an experiment, chemists heated a solid, red substance in a test tube. vapors…

select the correct answer. in an experiment, chemists heated a solid, red substance in a test tube. vapors from the heated red substance condensed as a metallic liquid on the side of the tube. the red substance eventually disappeared, leaving only the metallic liquid and producing a gas that escaped from the tube. which statement best describes what happened to the red substance in this experiment? a. the experiment demonstrates the formation of plasma from the red substance. b. the experiment demonstrates a physical property of the red substance. c. the experiment shows that the red substance experienced a chemical change. d. the experiment shows that the red substance can be a solid, liquid, or gas. e. the experiment shows that the red substance is an element.

select the correct answer. in an experiment, chemists heated a solid, red substance in a test tube. vapors from the heated red substance condensed as a metallic liquid on the side of the tube. the red substance eventually disappeared, leaving only the metallic liquid and producing a gas that escaped from the tube. which statement best describes what happened to the red substance in this experiment? a. the experiment demonstrates the formation of plasma from the red substance. b. the experiment demonstrates a physical property of the red substance. c. the experiment shows that the red substance experienced a chemical change. d. the experiment shows that the red substance can be a solid, liquid, or gas. e. the experiment shows that the red substance is an element.

Answer

Brief Explanations:

A chemical change results in the formation of new substances. Here, the red - solid substance disappeared and new substances (metallic liquid and gas) were formed upon heating. This indicates a chemical reaction has occurred. Physical properties like melting or boiling would not result in the formation of new substances. There is no indication of plasma formation, and the experiment doesn't prove the substance can exist in all three states simultaneously in a normal phase - change sense, nor does it prove the substance is an element.

Answer:

C. The experiment shows that the red substance experienced a chemical change.