The air pressure at the bottom of a mountain (sea level) is 1.02 atm and the current temperature is 24.6°C. A hiker climbs to the top of the mountain, approximately 10,000 feet, and the air pressure decreases to 10.21 psi. What is the temperature at the top of the mountain?

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