The complete combustion of methane can be seen in the equation: CH, + 202 CO2 + 2H2O If 50 g of methane are reacted completely, which statement describes the reaction?​

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)