Chlorine forms from the reaction of hydrochloric acid with manganese(IV) oxide. The balanced
equation is: MnO 2 + 4HCl → MnCl 2 + Cl 2 + 2H 2 O
Calculate the theoretical yield and the percent yield of chlorine if 86.0 g of MnO 2 and 50.0 g of HCl
react. The actual yield of Cl 2 is 20.0 g.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later