After being thoroughly stirred at 10.°c, which mixture is heterogenous? (1) 25.0 g of kcl and 100. g of h2o
(2) 25.0 g of kno3 and 100. g of h2o
(3) 25.0 g of nacl and 100. g of h2o
(4) 25.0 g of nano3 and 100. g of h2o

The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 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