Determine the mass of Na3Ag(S2O3)2 produced if 0.275g of AgBr is removed

Question

Photographic film contain silver, bromide and gelatin. Once exposed, some of the silver, bromide, decomposes, producing fine grains of silver. The unexposed silver bromide is removed by treating the film with sodium thiosulfate. soluble sodium silver thiosulfate. (Na3Ag(S2O3)2) is produced. AgBr(s)+ 2Na2S2O3(at) yields Na3Ag(S2O3)2 (aq)

Answer 1

You're given the mass of one of the reactants and trying to find the mass of the product. This will require 3 steps. First convert the mass of AgBr to moles using the molar mass of Ag and Br. Then convert moles of AgBr to moles of Na₃Ag(S₂O₃)₂ and finally convert the moles of Na₃Ag(S₂O₃)₂ to grams.