Question 39 - Math Practice Test for the NLN NEX

A scientist is creating a diluted solution by mixing a \(12\%\) concentration with water to create \(500\) milliliters of a \(4\%\) solution. How much of the \(12\%\) concentration should the scientist use?

\[166.67 \, \text{mL}\]
\[150 \, \text{mL}\]
\[333.33 \, \text{mL}\]
\[240 \, \text{mL}\]

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