Balance the equation for aluminum burning in oxygen to form aluminum oxide. Al + O2 > Al2o3

What is the temperature of one mole of helium gas at stp?

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)

At element makes up all organic compounds?