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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)

Find the mass, in grams, of 5.00*10^23 molecules of f2

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2