The moon is 260,000 miles away. How many feet is it from earth?

The reaction q+r2=r2q is found to be first order in r2 and

Which compound contain an iron with a 3+ charge

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