How long does jarred pasta sauce last in the fridge?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

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

May someone me with these science questions