According to the question, the actual percentage concentration of phenylephrine hydrochloride is 1.
<h3>What is Percentage concentration?</h3>Percentage concentration may be defined as a type of measurement of the amount of solute dissolved in every 100 units of solution.
According to the question, the amount of phenylephrine hydrochloride = 50 mg.
The volume of injection = 5 mL.
Percentage concentration = = 5/5 = 1.
Therefore, according to the question, the actual percentage concentration of phenylephrine hydrochloride is 1.
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