Ihave no idea what this question is talking

ethanol contains the elements carbon, hydrogen, and oxygen. when ethanol burns, it chemically reacts with oxygen gas.

c2h6o + o2
ethanol oxygen gas

what elements will be present in the substances that are created when ethanol burns?

a. nitrogen, sulfur, and sodium only
b. carbon, hydrogen, and oxygen only
c. carbon and hydrogen only
d. the elements cannot be determined

Why are the trends and exceptions to the trends in ionization energy observed?

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

How does the digestive system interact with the circulatory system? a. messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system. b. nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system. c. nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system. d. oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.