CHEM
Week 6.docx

# Week 6.docx - Written Assignment 6 Gases Answer all...

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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? (5 points) P1V1=P2V2 .970*725= .541*V2 V2= 1300 ml 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) P1V1=P2V2 1*5.80= P2*9.65 .601 atm * 760/1 = 457 mmHg 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) It is lower due to the make up of the molecules. Solids and liquids’ molecules are tightly packed/connected while gas molecules are more spread out. The units can be g/l and g/ml. Usually expresses as g/l due to densities of gases being very low under atmospheric conditions.

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• Spring '15
• Khurana
• Thomas Edison State University

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