C3H8 + 5 02 — 3 CO2 + 4 H20 a. How many liters of propane(C3H8) will produce 5.67 liters of carbon dioxide?
b. How many moles of propane are needed to produce 5.67 liters of carbon dioxide?
c. What mass of propane is needed to produce 5.67 liters of carbon dioxide?

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)