Remarkably, a catalytic system that uses light energy to hydrolyze water into hydrogen h2(g) and o(g) has been devised (science 334, 2011: 645-648) to capture and efficiently store solar energy. hydrogen is "clean burning" in that it yields only h2o. in this problem you will contrast the combustion of 1 kgh2(g) to that of 1 kg of n-octane.

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)