If a compound contains 8.1 g of nickel and 2.29 g of oxygen, what is the mass percent of nickel in the compound

 The  percentage  nickel   in  the  compound is  calculated  as  follows

step  one,adding  the  total  mass
that  is  8.1g+  2.29g  =10.39g
step  two,  take  the  percentage  of  nickel  divide  total  multiply   by 100

that  is   8.1/10.39 x100=  77.95%

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