Provide the Whole-number mole-ratio of O2 when the hydrocarbon C[X] H[Y] is combusted completely.

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

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)

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!