How much silver can be produced from 125g of ag2s

First, you know that for every one Sulfide in the compound there are two silvers.  Now, you need to know the molecular weight of this compound which is 248 g/mol.  (The weight of silver is 108g.  multiply this by two to get the total weight of Ag in Ag2S, which is 216g, and add this to the weight of sulfur, which is 32, and you get 248g/mol).  Now you have to set up a proportion.  

There are 216g of silver in 248g of Ag2S, how many grams of silver are there in 125g of Ag2S?

216g Ag / 248g Ag2S = x / 125 g Ag2S

x = 109g Ag.

Explanation:

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.