Claire ran 20 miles in 4 hours. what was her average speed?

Ineed ! it’s science and it’s due tomorrow!

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

Acontrol during an experiment. might change remains constant does not exist does change