A small container of gas was allowed to expand into a much larger one. If the co
ID: 527221 • Letter: A
Question
A small container of gas was allowed to expand into a much larger one. If the container had a volume of 325 ml at 3.6 atmospheres pressure and 25 degree C and the large container had a volume of 6830 ml and a final pressure of 0.180 atmospheres, what was the final temperature of the gas? A) 11.6 degree C B) 40.1 degree C C) 26.3 degree C D) 313 degree C A mixture of 3.0 moles of hydrogen and 1.0 moles of nitrogen are contained in a 250 degree C. What is the partial pressure of nitrogen in the vessel? A) 1.6 atmospheres B) 0.86 atmospheres C) 3.4 atmospheres D) 2.6 atmospheres The identity of an element is determined by A) the atomic weight. B) the of protons it contains. C) the number of protons and neutrons. D) the number of electrons in the nucleus. Which of the following sots of quantum numbers is NOT allowed. A) n=5; l=3, ml=0 B) n=3; l=2, ml=-2 C) n=1; l=0, ml=0 D) n=3; l=0, ml=-1 Table 2 may be used for the questions that follow. Table 2. The activity series Three metals - gold, silver, and zinc - ate placed in contact with a solution of Cu2+. A) zinc B) silver and zinc C) silver and gold D) gold and zincExplanation / Answer
7)
Vi = 325 mL
Pi = 3.6 atm
Ti = 25 oC = (25 + 273) K = 298 K
Vf = 6830 mL
Pf = 0.180 atm
Tf = ?
use:
Pi*Vi/Ti = Pf*Vf/Tf
3.6*325/298 = 0.180*6830/Tf
Tf = 313.1 K
Tf = (313.1 - 273) oC
Tf = 40.1 oC
Answer: B
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