JEE Main 2019 Chemistry question
A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of CO at T = 298.15 K and p = 1 bar. If molar volume of CO is 25.0 L under such condition, what is the percentage of sodium bicarbonate in each tablet? [Molar mass of NaHCO = 84 g mol]
Answer: (C)
Solution
CO = mol ⇒ NaHCO = 0.84 mg ⇒ 8.4%.