1. Not all Gas Law problems have Kelvin (K) as the unit of temperature. They can
ID: 705235 • Letter: 1
Question
1. Not all Gas Law problems have Kelvin (K) as the unit of temperature. They can be expressed in Celsius (°C) and Fahrenheit (°F). So convert 123°C to K. a. 396K b. 486K c. 369K According to Charles Law, if you have a balloon inside a car at noon during a hot summer day the balloon molecules inside will increase with pressure. a. True b. False 3. Which of the following statements concerning equal volumes of gases N20 and CHs, at the same temperature and pressure, is true. A) They have the same density B) They have the same number of molecules C) They have the same number of atoms D) Both A and B 4. If nitrogen gas occupies a volume of 500 mL at a pressure of 0.971 atm. What volume will the gas occupy at pressure of 1.5 atm, assuming the temperature remains constant? A) 342 mL B) 424 mL C) 324 mlL D) 442 mlL E) 242 ml Which instrument would best be suited for use in volumetric analysis to find the unknown molarity of base when titrated with a known acid? A) Graduated cylinder B) Pipette C) 250 mL beaker D) Burette E) Electronic balance 5. 6. TRUE or FALSE. According to Charles Law, if you have a balloon inside a car at noon during a hot summer day the balloon molecules inside will increase in pressure. A) False B) True In a neutralization reaction performed in the lab, a student mixed 0.20 M NaOH with 0.1M HCI until the reaction was complete. After the liquid in the container was dried, which of the following statements must be true? 7.Explanation / Answer
1.) 123 + 273 = 396 K so the answer is a.
2) The answer is true.According to Charle's Law " Temperature is directly proportional to the volume when pressure is kept contant".
3) The answer is c. (They have same number of atoms).Both have two atoms ( In N2O ; N and O and in C3H8 ; C and H).
4)The answer is C (324 mL).
P1V1 = P2V2
V2 = P1V1 / P2
V2 = 0.971 x 500 / 1.5 = 323.66 mL = 324 mL.
5) The answer is D (Burette).
6) The answer is True.
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