Amphoteric substances are capable of acting as a base or an acid in a reaction. The reason water is
considered amphoteric is because it is capable of self-ionizing. Another popular amphoteric
compound is Al2O3. These molecules are able to accept and donate a proton.
answered: Guest
given:
mass of na = 115 g
excess cl2
to determine:
mass of nacl produced
explanation:
given reaction is-
2na(s) + cl2(g) → 2nacl(s)
since cl2 is in excess, na will be the limiting reagent
as per the reaction stoichiometry na: nacl = 1: 1
i.e. moles of na reacted = moles of nacl formed
now, # moles of na = mass of na/atomic mass
= 115 g/23 g.mol-1 = 5 moles
therefore, moles of nacl = 5
molar mass of nacl = 58 g/mol
mass of nacl = 5 moles * 58 g.mol-1 = 290 g
ans: amount of nacl produced = 290 g
answered: Guest
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