Which change shows a tenfold increase in concentration of h+ ions? a ph 1 → ph 10 b ph 2 → ph 1 c ph 10 → ph 1 d ph 1 → ph 2

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