Which instrument, along with a telescope, allows study of the wavelengths of visible light coming from a star? a. a shortwave radio set b. a nuclear reactor c. a solar flare d. a spectrograph

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