Which of the following is NOT a sign (indicator) that a chemical reaction has occurred? A. formations of a precipitate
B. formation of a gas
C. change in state of matter

Easy definition for atom and atomic mass

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Building glycogen from glucose molecules is an example of