Written Assignment 6 Chem-Nate.docx - Name Nate Stults College ID:0641016 Thomas Edison State University General Chemistry I with Labs(CHE-121 Section

# Written Assignment 6 Chem-Nate.docx - Name Nate Stults...

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Name: Nate Stults College ID:0641016 Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: 6 Semester and year: Feb 2019 Written Assignment 6: Gases Answer 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 expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? PV=nRT-> PV/nRT=constant P 1 V 1 = P 2 V 2 ( 0.970 atm ) ( 725 mL ) =( 0.541 atm )( V 2 ) V ( ¿¿ 2 ) 703.25 .541 = V 2 →Volume = 1,299.91 mL 703.2500 = ( .541 atm ) ¿ (5 points) (Reference: Chang 5.19) 2. The volume of a gas is 5.80 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.65 L? (The temperature remains constant.) (5 points) P 2 = P 1 V 1 V 2 1 atm ( 5.80 L ) 9.65 L = .6010 atm→ 0.6010 atm = 760 mm Hg 1 atm .6010 atm = 457 mmHg (Reference: Chang 5.21) 3. 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) 1 Copyright © 2017 by Thomas Edison State University . All rights reserved.
Under atmospheric pressure the liquid and solid molecules are more squished together compared to the gas molecules. The unit they use to express density of gases is grams/Liter(g/L).

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