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A gas jar of 10 litre volume filled with `O_(2)` at 300 K is connected to glycerine manometer. The maonometer shows 5 m difference in the level as shown in figure. What will be the number of moles of `O_(2)` in the gas jar ? (Given `d_("glycerine") = 2/72 g // mL , d_("mercury") = 13.6 g//mL`)A. `0.64 mol`B. `0.4 mol`C. `0.94 mol`D. `0.36 mol` |
Answer» Correct Answer - C `(h xx d xx g)_(Hg) = (h xx d xx g)_("glycerine")` `(h xx 13.6)_(Hg) = (5 xx 2.72)_("glycerine")` `h_(Hg) = 1m` `P_("gas") = (1 + 0.76) m` `= 1760 mm Hg` `PV = nRT` `(1760)/(760) xx 10 n xx 0.0821 xx 300` `n = 0.94 mol` |
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