Gases in Equilibrium!

A thermally conducting piston can move freely in a thermally insulated cylindrical vessel, separating two compartments. Compartment 11 contains 14mg14mg of N2N_2 gas and compartment 2 contains 20mg20mg of He He gas. When the piston attains its equilibrium position, the length of compartment 11 becomes L1L_1 and that of compartment 22 becomes L2L_2 (see figure). The molecular weight of nitrogen is 2828 and that of helium is 44. Then the ratio is L1L2\frac{L_1}{L_2}

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