The physician ordered 50 mL of 1:20 W/V solution, diluted to 1000 mL. What is the ratio strength of W/V?
1:200
1:300
1:400
1:500
1:400
Rationale: The ratio strength of W/V is 1:400 . To calculate, begin with 1:20 = 5%. Therefore, 50 mL x 5% = 1000 mL x X%. This gives: 2.5 = 1000 x X%. Dividing by 1000 produces X = 0.25% or 1:400.
You might also like to view...
Newborn with scalp injury from internal fetal monitor
a. P12.89 b. Z38.00, P12.89 c. P12.41 d. Z38.00, P12.4
Choose the correct statement as regards housekeeping tasks to be performed in the kitchen.
A. Always work from the clean to dirty areas of the kitchen. B. The kitchen is not a concern regarding potential infection. C. Sweep the kitchen floor once every 2 days. D. Clean up the kitchen at the end of the day.
Disclosure of which of the following conditions requires a specific authorization from the patient other than for TPO?
A. obesity B. hives C. croup D. AIDS
List several benefits of therapeutic massage