Nickel-iron battery
in1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery.
fe(s) + 2nio(oh)(s) + 2h2o(1) —> fe(oh)2(s) + 2ni(oh)2(aq)
how many mol of fe (oh)2 is produced when 5.00 mol of fe and 8.00 mol of nio(oh) react?

4.0 moles of Fe(OH)₂.

Explanation:

It is a stichiometry problem.The balanced equation: Fe + 2NiO(OH) + 2H₂O → Fe(OH)₂ + 2Ni(OH)₂,It is clear that 1.0 mole of Fe reacts with 2.0 moles of NiO(OH) and 2.0 moles of H₂O to produce 1.0 mole of Fe(OH)₂ and 2.0 moles of Ni(OH)₂.The given data: 5.00 moles of Fe reacts with 8.00 mol of NiO(OH).From the stichiometry; 4.0 moles of Fe (1.0 mole will be in excess) reacts completely with 8.0 moles of NiO(OH) and produce 4.0 moles of Fe(OH)₂.

Only one reactant yields 2 or more products. meaning you will only have 1 product and it will break down into 2 or more products. eg. h2o -> h2 + o2