A nurse is preparing to administer promethazine 15 mg IM to a child. The amount available is promethazine 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.3"]
Step by step calculation:
The desired dose of promethazine is 15 mg.
The available concentration is 50 mg/mL.
Calculating the volume to administer:
Use the concentration of the medication: 15 mg ÷ 50 mg/mL = 0.3 mL
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Related Questions
Correct Answer is ["350"]
Explanation
Step by step calculation:
Plug in the values:
1 tablet contains 350 mg of calcium carbonate.
Perform the calculations:
1 tablet / 350 mg = 1 tablet / x mg
Solve for x:
Cross-multiply: 350 mg x 1 tablet = 1 tablet x x mg
Rounding and final answer:
x = 350 mg.
Correct Answer is ["0.4"]
Explanation
Step by step calculation:
The child's weight is 22 lb.
The medication dosage is 3 mg/kg.
The available medication concentration is 45 mg/0.6 mL.
Calculating the total dose in mg per dose:
Convert the child's weight to kg: 22 lb ÷ 2.2 lb/kg = 10 kg
Calculate the total dose per dose: 10 kg × 3 mg/kg = 30 mg
Calculating the volume to administer per dose:
Use the concentration of the medication: 30 mg ÷ (45 mg/0.6 mL) = 30 mg ÷ 75 mg/mL = 0.4 mL
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