Dung dịch thu được khi trộn lẫn 200 ml dung dịch NaCl 0,2M và 300 ml dung dịch Na2SO4 0,2M có nồng độ cation Na+ là bao nhiêu?

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

Its a hope this

Its trait is different and it the organism survive

Not a  mixture of two common elements that can be separated by physical means.