(adsbygoogle = window.adsbygoogle || []).push({}); Question 1:5L of nitrogen at 100kPa and 298K and 5L of oxygen at 200kPa are pumped into a evacuated 50L cylinder. Temperature remains constant, what is the total pressure in the cylinder?

Correct Answer:30kPa

My answer:300 kPa

Question 2: A 10L flask containing nitrogen at 500mmHg is connected via a closed tap to a 4L flask containing oxygen at 800mmHg pressure, if the tap is opened what will be the final pressure assuming temperature remains constant?

Answer:586mmHg

My answer:1300mmHg

Formulas I used:

pV = nRT (to find mols)

PA = (nA/nA+nB) x PT

How did they get these answers...cos I can't seem to get them..?? Any help would be appreciated...

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# Partial Pressure Calcs.

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