A pre-weighed vessel was filled with oxygen at NTP and weighed. It was then evacuated, filled with S — States of Matter and Gaseous State Chemistry Question
Question
A pre-weighed vessel was filled with oxygen at NTP and weighed. It was then evacuated, filled with SO₂ at the same temperature and pressure, and again weighed. The mass of oxygen will be
Answer: B
💡 Solution & Explanation
Equal volumes at same T and P hold equal moles. Mass O2 = n * 32, Mass SO2 = n * 64. Mass O2 is half of SO2. Therefore, correct answer is B.
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