How many grams of a 2.5% hydrocortisone ointment must be mixed with 240g of a 0.25 hydrocortisone cream to make a 1% ointment?
12g
24g
84g
120g
120g
Rationale: 120 grams of a 2.5% hydrocortisone ointment are required. This is an alligation problem. Use the proportion: 1.5 parts / 2.25 parts = 240g / X. So, X = 360g. To calculate the amount of 2.5% ointment needed, subtract the amount of 0.25% ointment from the total weight of the compound. 360g (total weight) – 240g (weight of 0.25% ointment) = 120g (weight of the 2.5% ointment).
You might also like to view...
All of the following increase the requirements of vitamin C with the exception of one. What is the exception?
A) Trauma B) Smoking C) Diabetes D) Hemodialysis
The principle reason for a visit is the:
A) social history. B) past medical history. C) review of systems. D) chief complaint. E) history of present illness.
Which of the following is a relatively new respiratory disease caused by a virus that is very contagious and sometimes fatal?
A. SARS B. Sinusitis C. SIDS D. TB E. RDS
The document patients sign to signify that they have read and understood how the provider will protect their PHI is the
A. Assignment of Benefits. B. Patient Information Form. C. Medical History Form. D. Acknowledgment of Receipt of Notice of Privacy Practices.