A sample gas contains 0.1400 mol of C2H4(g) and 0.1400 mol of Br2(g) and occupies a volume of 17.3 L. The following reaction takes place: C2H4(g)+Br2 (g) = > CH2BrCH2Br(g)

calculate the volume of the sample after the reaction takes place, assuming that the temperature and the pressure remain constant.

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -

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