Number of moles in 9.04 x 1023 molecules of H2O?

Which of these conditions most likely produces an unstable isotope?

What type of organic molecule comprises the majority of a potato?

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)