Iron and oxygen react together and form rust. iron is a gray metal and oxygen is a colorless gas. rust is a reddish-brown solid. which of the following explains the change?
a.)the product has the same properties as the reactants because matter is conserved.
b.)the product has different chemical properties than the reactants because a chemical reaction occurred.
c.)the product only has different physical properties than the reactants because a chemical reaction occurred.

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.