In the following equilibrium, as the concentration of CrO 4 -2 ion is increased, the concentration of Cr 2O 7 -2 ion will 2 CrO 4 -2(aq) + 2 H +1(aq) - Cr 2O 7 -2(aq) + H 2O (l)
a. Increase b. Decrease c. Remain the same

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)