12. Some concentrated nitric acid, HNO3, density 1.21 g/mL, fills a beaker to the 760 mL mark. The beaker weighs 211 g. How much does the solution weigh? ab requires

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