The answer to this equation would be choice (2) equal to the total mass of the products
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EXPLANATION: According to the Law of Conservation of Mass, the amount of each element must be the same for both sides of a chemical equation (for a balanced equation* don't worry about this- just simply keep in mind that this law just says that both sides of the equation must have the same things, which means that it's balanced).
To add on, this is the case for your question as both sides of the chemical equation have the same things- Na (sodium), Ag (argon), N (nitrogen), O (oxygen) -> (NO3), and Cl (chlorine).
HOPE THIS HELPS!
