If a portable liquid oxygen reservoir is set to deliver 6 L/min and the current reservoir weight is 38 lb, it will take _____ hours for the reservoir to empty if the weight of an empty container is 10 lb
a. 5 c. 27
b. 23 d. 36
ANS: C
Subtract 10 lb from 38 lb = 28 lb. Convert 28 lb/2.5 lb/L = 11.2 lb. 11.2 lb ? 860 = 9632 L. Then divide by liter flow: 9632 L/6 L/min = 1605 minutes, or 27 hours.
Health Professions
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