If 20. liters of oxygen at 1.2 atm and 299°K are heated to 512 ºk at 3.4 atm, what will be the new volume of gas?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.