A mixture of math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymiNe/mi/math and m...

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A mixture of math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymiNe/mi/math and math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymiAr/mi/math at \( 250 \mathrm{~K} \) has a total \( \mathrm{K} \).E. \( =3 \) \( \mathrm{kJ} \) in a closed vessel, the total mass of math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymiNe/mi/math and math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymiAr/mi/math is \( 30 \mathrm{~g} \). Find mass \( \% \) of \( \mathrm{Ne} \) in gaseous mixture at \( 250 \mathrm{~K} \).
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