Final answer:
The dose of the drug is calculated by dividing the amount of the drug given (5 mg) by the weight of the animal (10 kg), resulting in a dose of 0.5 mg/kg.
Step-by-step explanation:
To determine the dose of a drug in milligrams per kilogram (mg/kg), you divide the total milligrams of the drug administered by the weight of the animal in kilograms. In this scenario, you have given 5 mg of a drug to a 10-kg animal.
The calculation would be:
Dose (mg/kg) = Total drug administered (mg) / Weight of the animal (kg)
Dose (mg/kg) = 5 mg / 10 kg
Dose (mg/kg) = 0.5 mg/kg
Therefore, the correct dose is 0.5 mg/kg.