A car travels at a speed of 80.0 miles/hour. What is the speed of the car in meters/second (m/s)?

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Which is a characteristic of mixtures?

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