Question

what mass of sodium chloride will react with 18.85 g of silver nitrate to produce 12.25 g of silver chloride and 10.45 g of sodium nitrate if law of conservation of mass holds true?

Answer 1

RMM of NaCl = 58.5 and RMM of Sodium nitrate is 85

i.e 58.5g of NaCl reacts with excess silver nitrate to form 85g of sodium nitrate.

therefore, if we are to form 10.45g of sodium nitrate, then the mass of sodium chloride will be

(58.5*10.45)/1.0.45 = 7.192