Scan QR code or get instant email to install app
Question:
What is the weight/weight percent (w/w%) of 412.5 mg of nitroglycerin in 33 grams of a compounded prescription?
A
1.25% nitroglycerin
explanation
Weight/weight (w/w%)—measured in grams of the ingredient/100 grams of the total product: 412.5 mg = 0.4125 grams (There are 1,000 mg in one gram—just move decimal 3 places to the left.) 0.4125 grams/33 grams = 0.0125 = 1.25% (To get a %, multiply by 100—or move the decimal 2 places to the right.)
Take more free practice tests for other PTCB topics with our ptcb practice test now!
Related Information
Comments
Shaniac20
3 years ago
I recommend!
Mingy6
3 years ago
I like this App a lot. I got a few apps to prepare for PTCE but this is the best one so far! It has tests and practice questions with explanations.
Bfarley14
3 years ago
Awesome app