Aballoon that contains 0.750 moles of gas has a volume of 16.8 l. if additional gas causes the balloon to expand to a volume of 25.4 l at a constant pressure and temperature, how many moles of gas does the balloon now contain?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering