2. A 25.0 mL sample of neon gas at 455 mm Hg is cooled from 100 degrees celsius
ID: 796909 • Letter: 2
Question
2. A 25.0 mL sample of neon gas at 455 mm Hg is cooled from 100 degrees celsius to 10 degrees celcius. If the volume remains constant, what is the final pressure?
3. A 100.0 mL sample of air collected at 21 degrees celcius and 772 mmHg. What is the volume of air at STP?
4. A sample of xenon gas occupies 500.0 mL at -185 degrees celcius and 75.0 cm Hg. Calcuate the celcius temperature if the volume is 225.0 mL at 55.0 cm Hg
5. A steel cylinder with nitrogen, hydrogen, and ammonia gases is at 500 degrees celcius and 5.00 atm. If the partial pressure of nitrogen gas is 1850 mmHg and hydrogen is 1150mg Hg, what is the partial pressure of ammonia in mmHg?
Explanation / Answer
2) P1/T1=P2/T2
455/373=p2/283
p2=345.21mmof Hg
3) p1v1/T1=P2V2/T2
100*772/294 =760 *V2/298
V2=102.96ml
4) p1v1/T1=P2V2/T2
75*500/88 =55*225/T2
T2=-243.96C
5)
TOTAL PRESSURE=5*760=3800mm OF Hg
total pressure= PN2 +PH2+PNH3
3800 = 185 0 +1150 +P NH3
P( NH3) = 800 mm of Hg
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