500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be _____________ mm Hg?
Correct answer: A. 650
- A. 650
- B. 700
- C. 600
- D. 375
Explanation
Each gas expands from 0.5 L to the final 1 L vessel, so its partial pressure is halved: 350 mm Hg for hydrogen and 300 mm Hg for oxygen. Their sum is 650 mm Hg, option a.
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