What are insulated foam cups most likely made out of?

Which characteristics can be used to differentiate star systems? check all that apply.

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

In a ball-and-stick molecular model, what do the sticks represent?