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A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample is
- a)480 torr
- b)600 torr
- c)525 torr
- d)450 torr
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
A sample of air contains only N2, O2 and H2O. It is saturated with wa...
Pressure of dry air = Pmoist air − Pwater vapours
= 640 - 40 = 600 torr
Partial pressure ∝ mole fraction
∴ Partial pressure of N2 and O2 are also in the ratio of 3 : 1.
Partial pressure of 
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Community Answer
A sample of air contains only N2, O2 and H2O. It is saturated with wa...
Given Information:
- Total pressure = 640 torr
- Vapour pressure of water = 40 torr
- Molar ratio of N2 : O2 = 3 : 1
Calculating Partial Pressure of Water Vapour:
- Given that the vapour pressure of water is 40 torr, so the partial pressure of water vapour in the sample is 40 torr.
Calculating Partial Pressure of Dry Air:
- Total pressure = Partial pressure of dry air + Partial pressure of water vapour
- Partial pressure of dry air = Total pressure - Partial pressure of water vapour
- Partial pressure of dry air = 640 torr - 40 torr = 600 torr
Calculating Partial Pressure of N2:
- Molar ratio of N2 : O2 = 3 : 1
- Total moles of gas = Moles of N2 + Moles of O2
- Let the moles of N2 be 3x and moles of O2 be x
- Total moles = 3x + x = 4x
- Partial pressure of N2 = Moles of N2/Total moles * Partial pressure of dry air
- Partial pressure of N2 = 3/(3+1) * 600 torr = 450 torr
Therefore, the partial pressure of N2 in the sample is 450 torr, which corresponds to option 'D'.
- Total pressure = 640 torr
- Vapour pressure of water = 40 torr
- Molar ratio of N2 : O2 = 3 : 1
Calculating Partial Pressure of Water Vapour:
- Given that the vapour pressure of water is 40 torr, so the partial pressure of water vapour in the sample is 40 torr.
Calculating Partial Pressure of Dry Air:
- Total pressure = Partial pressure of dry air + Partial pressure of water vapour
- Partial pressure of dry air = Total pressure - Partial pressure of water vapour
- Partial pressure of dry air = 640 torr - 40 torr = 600 torr
Calculating Partial Pressure of N2:
- Molar ratio of N2 : O2 = 3 : 1
- Total moles of gas = Moles of N2 + Moles of O2
- Let the moles of N2 be 3x and moles of O2 be x
- Total moles = 3x + x = 4x
- Partial pressure of N2 = Moles of N2/Total moles * Partial pressure of dry air
- Partial pressure of N2 = 3/(3+1) * 600 torr = 450 torr
Therefore, the partial pressure of N2 in the sample is 450 torr, which corresponds to option 'D'.
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A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer?
Question Description
A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer?.
A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A sample of air contains only N2, O2 and H2O. It is saturated with water vapours and the total pressure is 640 torr. The vapour pressure of water is 40 torr and the molar ratio of N2 : O2 is 3 : 1. The partial pressure of N2 in the sample isa)480 torrb)600 torrc)525 torrd)450 torrCorrect answer is option 'D'. Can you explain this answer?.
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