Organisms on earth are
what-based life forms
oxygen
hydrogen
carbon

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

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