1. Silver sulfide (Ag, S) is the common tarnish on silver objects. The reaction if the
formation of silver sulfide is given below:
4AG (s) + 2H2S (9) + O2(g) - 2Ag, S (s) + 2H20 (1)
a. What mass of Ag, can be made from 11.2 L of HS gas at STP? (124)
b. How many grams of Ag are needed to react with 11.2 L of H, S? (108 g)
help me pls. and show work and explain

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

Ido not understand. 

Polymerization reaction

H tricky one let me think and get back to u