NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare rigorously for the NAPLEX, the pivotal examination for pharmacy licensure! Gain confidence with expertly crafted quizzes and study materials tailored for aspiring pharmacists. Elevate your understanding and skills today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.


What is the percent elemental calcium in Calcium carbonate?

  1. 40%

  2. 21%

  3. 10%

  4. 30%

The correct answer is: 40%

Calcium carbonate consists of 40% elemental calcium. This means that for every 1,000 mg of calcium carbonate, there are 400 mg of elemental calcium. It is important for pharmacists to understand the percent elemental calcium in different calcium salts to accurately dose calcium supplementation for patients. Option B (21%), Option C (10%), and Option D (30%) are incorrect because they do not represent the correct percentage of elemental calcium in calcium carbonate.