A student doing a lab found that a 0.437 g sample of Alka-Seltzer produced 29.47 mL of

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A student doing a lab found that a 0.437 g sample of Alka-Seltzer produced 29.47 mL of gas when the room was 23 Celsius. What was the percentage of sodium bicarbonate in the Alka Seltzer? You may ignore the apparatus correction factor portion of the calculation.