A chemist is using 339 milliliters of a solution of acid and water. If 12.5% of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth.

Answer 1

To find the amount of acid in the solution, you can use the formula:

\[ \text{Amount of acid} = \text{Total volume} \times \text{Percentage of acid} \]

In this case, the total volume of the solution is 339 milliliters, and the percentage of acid is 12.5%, which can be written as a decimal (0.125).

Now, calculate the amount of acid:

\[ \text{Amount of acid} = 339 , \text{ml} \times 0.125 \]

Now, perform the multiplication:

\[ \text{Amount of acid} = 339 \times 0.125 = 42.375 , \text{ml} \]

Finally, round this to the nearest tenth:

\[ 42.375 \approx 42.4 , \text{ml} \]

Thus, the amount of acid in the solution is approximately 42.4 milliliters.