One Alka-Seltzer tablet weighs 3.24 g. What percent by mass of the tablet is sodium bicarbonate?

Answer 1

Per the drug facts provided by Bayer, a single tablet of alka seltzer has 1000mg Citric Acid, 325mg Aspirin, and 1916mg Sodium Bicarbonate.

To find percent by mass, divide the mass of sodium bicarbonate (1916mg or 1.916g) by the total mass (3.24g). Doing so gives us 59.1%