The U.S. standard for arsenate in drinking water requires thatpublic water supplies must contain no greater than 10 partsper billion (ppb) arsenic. If this arsenic is present as arsenate,AsO43-, what mass of sodium arsenate would be present ina 1.00-L sample of drinking water that just meets the standard?Parts per billion is defined on a mass basis asppb =g soluteg solution * 109

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