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A sample of groundwater is tested for arsenic by reacting it with excess silver nitrate until no more solid product is formed as per the reaction below. If {x} grams of silver arsenate is obtained, how many grams of sodium arsenate were in the groundwater sample? The molar mass of Ag3AsO4is 462.52 g/mol. The molar mass of Na3AsO4 is 207.9 g/mol. Na3AsO4(aq)+AgNO3(aq)→3NaNO3(aq)+Ag3AsO4(s)