What did the model of the atom before the "gold foil experiment" predict would happen?

The balanced chemical equation for this lab is: 3cucl2(aq) + 2al(s) 3cu(s) + 2alcl3(aq) if 10.5 g copper chloride react with 12.4 g aluminum, what is the limiting reactant?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

What is a metal replacement reaction