Question

a chemist is using 388 milliliters of a solution of acid and water. if 15.7% of the solution is acid, how many milliliters of acid are there? round your answer to the nearest tenth. milliliters

Explanation:

Step1: Convert percentage to decimal

To convert \(15.7\%\) to a decimal, divide by \(100\). So \(15.7\%=\frac{15.7}{100}=0.157\).

Step2: Calculate the amount of acid

Multiply the total volume of the solution (\(388\) milliliters) by the decimal form of the percentage of acid. The formula is \(V = 388\times0.157\).

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Step3: Round to the nearest tenth

Look at the digit in the hundredth place. For \(60.916\), the digit in the hundredth place is \(1\). Since \(1\lt5\), we round down. So \(60.916\approx60.9\).

Answer:

\(60.9\)