2. Imagine there is a piece of lead (Pb) that has 1,000,000 atoms in it and a piece of cobalt (Co) with 1,000,000 atoms in it. Interpret the properties of the two atoms and make a scientifically supported judgement on
which piece has a greater mass. (max 7/8)

The answer is c) pyrite

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 -