Write the balanced equation when iron metal and aqueous hydrogen monobromide (acid) react to form an aqueous ionic salt from the iron (III) ion and another gaseous product.

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)