A sample of radium-226 decays to form radon-222. A solution of AgNO3 and NaCl reacts to form AgCl and NaNO3. How would an increase in the amounts of reactants affect these reaction rates?

An increase in the amounts of reactants in both reactions would generally lead to an increase in reaction rates. For the decay of radium-226 to radon-222, the decay rate is constant and not affected by reactant concentration. In the case of the AgNO3 and NaCl reaction, increasing the concentrations of AgNO3 and NaCl would increase the likelihood of particle collisions, thereby accelerating the formation of AgCl and NaNO3.