How do the potential energies of the reactants compare to those of the products in an exothermic reaction? Options: -They are the same. -The reactants’ potential energies are greater than the products’ potential energies. -The reactants’ potential energies are less than the products’ potential energies.

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

Who discovered a pattern to the elements in 1869?