One mole of which of the following gases will have the largest volume if they are all at the same temperature and pressure if they behave like ideal gases

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?