Round the following number to
3 significant figures:
3,545,530

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

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