True or false: Gravity plays an important role in the formation of stars. Pls help fast???

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

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world