1 The largest school district by enrollment with an election in 2016 is Wake County Public School System with 153,534 K-12 students.  The smallest North Carolina school district among the nation's largest with an election in 2016 is Duplin County Schools with 9,628 K-12 students.
Freon only remains a liquid while under pressure inside your refrigerator's cooling system. The chemical changes to a gas as soon as it contacts the air. This means, when you smell freon in and around your refrigerator, you're also inhaling varying amounts of freon gas. According to the Environmental Protection Agency, freon gas is denser than air and travels very slowly to the upper atmosphere.
â¢ For moist air: â Question for thought: At the same temperature and pressure, is moist air more dense or less dense than dry air?âAnswer: Less dense! â¢ At the same temperature and pressure, the same volume of gas contains the same number of molecules.Since H 2 O molecules weigh less than N 2 or O 2 molecules, the same volume of moist air actually weighs less than the same volume of dry air. For moist air: â Question for thought: At the same temperature and pressure, is moist air more dense or less dense than dry air?âAnswer: Less dense! â¢ At the same temperature and pressure, the same volume of gas contains the same number of molecules.