There are 250 gallons of pesticide. How much surfactant should be added to make a 0.1% solution?

To determine how much surfactant should be added to achieve a 0.1% solution in 250 gallons of pesticide, it's essential to understand what a 0.1% solution entails. A 0.1% solution means that there are 0.1 grams of surfactant per 100 milliliters of solution.

First, convert gallons to milliliters since the concentration is often easier to understand in metric units. There are approximately 3,785 milliliters in a gallon. Therefore, 250 gallons would convert to:

250 gallons × 3,785 mL/gallon = 946,250 mL.

To find out how many grams of surfactant are needed for a 0.1% solution in this volume, you calculate:

0.1% of 946,250 mL = 0.001 × 946,250 mL = 946.25 grams of surfactant.

Next, we need to convert grams to ounces. Since there are approximately 28.35 grams in an ounce, we convert:

946.25 grams ÷ 28.35 grams/ounce ≈ 33.4 ounces.

When rounding to the nearest option presented, 32