A \( 2.24 \mathrm{~L} \) cylinder of oxygen at math xmlns=http://www.w3.org/1998/Math/MathMLmn1/...

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A \( 2.24 \mathrm{~L} \) cylinder of oxygen at math xmlns=http://www.w3.org/1998/Math/MathMLmn1/mn/math atm and \( 273 \mathrm{~K} \) is found to develop a leakage. When the leakage was plugged the pressure dropped to \( 570 \mathrm{~mm} \) of \( \mathrm{Hg} \). The number of moles of gas that escaped will be 
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