# A child weighs 18.4 kg. The prescription is for 25 mg/kg of a medication. The medication available is 100 mg/mL. How many mL should the nurse administer? Record the answer using one decimal place. Round only at the end of the calculation.

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> subject: Medication Administration  
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## Question

A child weighs 18.4 kg. The prescription is for 25 mg/kg of a medication. The medication available is 100 mg/mL. How many mL should the nurse administer? Record the answer using one decimal place. Round only at the end of the calculation.

Record your answer using one decimal place.

mL

Enter the number only. The unit is already shown. Round only at the end of the calculation.

Calculator

0

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123=
0.Use rounded result

## Explanation

First calculate the prescribed dose: 25 mg/kg × 18.4 kg = 460 mg. Then divide by the concentration: 460 mg ÷ 100 mg/mL = 4.6 mL.

## In-depth explanation

Quick answer
4.6 mL.
Set up
First find total milligrams, then convert milligrams to milliliters using the supplied concentration.
Calculation
25 × 18.4 = 460 mg; 460 ÷ 100 = 4.6 mL. No intermediate rounding is needed.
**Sources**
- NCSBN — NCLEX Frequently Asked Questions: Calculation Items

- NCSBN — Prepare for the NCLEX

## Key concepts

- **Weight-based dose** — A dose calculated from the client weight in kilograms.
- **Concentration** — The amount of medication contained in each milliliter.

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