Solve this chemical equation: CH3CH2OH+__O2=CO2+__H2O

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

What structural formula represents 4 electrons shared between two atoms?

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring