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Partial pressure of one gas from the masses of three gases in a mixture and the total pressure

The same question, asked 2 times: 15 May 2023 S1*, 20 Apr 2025 S2. Every wording below, oldest first.

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  1. Question 1

    15 May 2023 S1

    55
    Calculate the partial pressure exerted by dioxygen from a mixture of 32 g O2_2, 80 g Ar (mol. mass 40) and 4 g dihydrogen Ptotal=10P_{\text{total}} = 10 bar.

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  2. Question 2

    20 Apr 2025 S2

    61
    A container consisting mixture of 28 g N2,8 gHe28\text{ }g{\text{ }N}_{2},8\text{ }gHe and 40 g Ne at 25∘C25^{\circ}C. If the total pressure exerted by the gaseous mixture is 20 bar, what is the partial pressure exerted by N2N_{2} ?

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