An Alka-Seltzer tablet contains exactly 100. mg of citric acid, H₃C₆H₅O₇, plus some sodium bicarbonate. What mass of sodium bicarbonate is required to consume 100. mg of citric acid by the following reaction?

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H3C6H5O7(aq) + 3 NaHCO3(aq) - 3 H₂O(l) + 3 CO₂(g) + Na3C,H,O,(aq)