For an approximate result, multiply the volume value by 3.785
Answer ≈ 56.7812
It is called rust and it forms when water soaks into the metal forming a chemical reaction.
So the equation is balanced, meaning they have the smallest amounts of each element in the reactants to create the products.
So, 2 moles of H2S (the coefficient) contributes to 2 moles Ag2S, which is why the ratio is 2:2.
I hope that made sense.