The total mass of the products will be 892 grams. This is because 496 grams of Pb(NO3)2 reacts with an equal mass of KBr (496 grams) to form PbBr2 and 2KNO3. PbBr2 has a molar mass of 368 grams/mol and 2KNO3 has a molar mass of 212 grams/mol. Therefore, 496 grams of Pb(NO3)2 will produce 368 grams of PbBr2 and 424 grams of 2KNO3, for a total mass of 792 grams. Additionally, the original 496 grams of Pb(NO3)2 and 496 grams of KBr must be added to the total mass of the products, for a total mass of 892 grams.
