Week 7 Lab Gas Laws Pre-Lab Quiz

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Arizona State University *

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Feb 20, 2024

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Week 7 Lab: Gas Laws Pre-Lab Quiz a* Question 1 0.5/0.5 pts Which of the following is NOT a variable that can be manipulated in a gas law equation? Pressure Volume Temperature Density CORRECT! While density of a gas can be calculated, it is not a variable in any of the gas law equations. Question 2 0.5/0.5 pts True or False. According to Charles’s Law, if you have a balloon inside a car at noon during a hot summer day, the molecules inside of the balloon will cause the volume of the balloon to decrease. True False CORRECT! Charles' Law states that temperature and volume of a gas are directly proportional, so as temperature increases, so does volume.
Question 3 0.5/0.5pts Name the gas law. Volume and pressure are indirectly proportional. Volume will decrease if pressure increases, and volume will increase if pressure decreases. Boyle's CORRECT! Boyle's Law relates pressure to volume. Charles’s Avagadro's Gay-Lussac’s Question 4 0.5/0.5pts Name the gas law. Temperature and pressure are directly proportional. If temperature increases, pressure will increase as well. Gay-Lussac's CORRECT! Gay-Lussac’s Law relates temperature to pressure. Avagadro's Charles’s Boyle's
Question 5 0.5/0.5pts What effect would a decrease in temperature have on pressure, assuming that volume (T) and moles of gas (n) are kept constant? Pressure would decrease. CORRECT! According to the Ideal Gas Law, PV=nRT, if T decreases while n and V are held constant, P will also decrease. Pressure would increase Pressure would stay the same regardless of a change in temperature. Question 6 0.5/0.5pts Which temperature scale has NO negative values? Kelvin CORRECT! Farenheit Celcius Digital
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Question 7 0.5/0.5pts Calculate the number of moles of gas with a volume of 35.0 L at a temperature of 32°C and pressure of 1.20 atm. 0.596 mol 1.68 mol CORRECT! Did you rearrange PV=nRT correctly for n? Does your temperature value have the correct units? 10.5 mol Question 8 0.5/0.5pts What is the temperature (°C) of 0.198 moles of air in lungs with a capacity of 5.41 L at an atmospheric pressure of 0.934 atm? 37.3°C CORRECT! 583°C 273°C 310°C
Question 9 0.5/0.5 pts Calculate the volume of 3.3 moles of gas with a pressure of 950 mmHg and temperature of 25 °C. (Hint: 760 mmHg = 1 atm) 0.02L 64.6 L CORRECT! 54L 11.8L Question 10 0.5/0.5pts A sample of nitrogen gas has a volume of 0.180 L, at a pressure of 0.800 atm and a temperature of 29°C. What is the new temperature (°C) of the gas at a volume of 90.0 mL and a pressure of 3.20 atm? 604°C 273°C 331°C CORRECT! 288°C Quiz Score: 5 out of 5

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