Without using numbers, explain the significance if the mole ratio term works out to 1/1 for any given stoichiometry exercise.

The ratio 1/1 implies that the quantity of the reactant needed and the product formed are the same.

Ido not understand. 

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy