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Mass of one gas needed so that its partial pressure equals that of another gas

The same question, asked 2 times: 25 Apr 2025 S2*, 18 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    25 Apr 2025 S2

    61
    A container contains 4 gH2,4 gHe4\text{ }gH_{2},4\text{ }gHe and certain amount of ' Ne ' at a certain temperature. What is the mass of 'Ne' required so that the partial pressure exerted by 'Ne' is equal to the partial pressure of He ?

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  2. Question 2

    18 Apr 2026 S1

    6
    What ratio by mass of 'Ne' and CH4\mathrm{CH_4} should be mixed so that partial pressure exerted by each gas is same?

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