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Written Assignment 6: GasesAnswer all assigned questions and problems, and show all work.1.A gas occupying a volume of 725 mL at a pressure of 0.970 atm is allowed to expandat constant temperature until its pressure reaches 0.541 atm. What is its final volume?2.The volume of a gas is 5.80 L, measured at 1.00 atm. What is the pressure of the gasin mmHg if the volume is changed to 9.65 L? (The temperature remains constant.)(5points)(Reference: Chang 5.21)(5.8*1)/9.65=P456.8 mmHg3.Why is the density of a gas much lower than that of a liquid or solid under atmospheric conditions? What units are normally used to express the density of gases? (5 points)