Write the rules to construct ray diagram of concave mirror

In which direction will the following reaction go if the standard reduction potentials are 0.80 v for ag/ag+ and –0.44 v for fe/fe2+? ag+ + fe → ag + fe2+ a.)forward b.)the reaction cannot occur. c.) not enough information is given. d.) reverse

Which element is the least metallic between cadmium, silver, zinc, or iron?

Word equation for k(s) +h2o(l) yield koh (aq) + h2