These sets represent already known and dated fossils. Which group of fossils appear first? Arrange the set of fossils in logical order by putting a number inside the box on the lower right corner of each division, 1 as first and 8 as last. You may use the "Fossil Information" sheet for reference. (see Fossil Information sheet on Parent’s Guide). Answer the questions below.

The answer is b on plato.

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 -