NBE Science Practice Test 2026 – All-in-One Guide to Master Your Exam Success!

To determine how many ounces of a 36 index fluid are required to create one gallon of a 0.5% solution, it’s important to understand the relationship between concentration, volume, and the weight of the substance.

A 0.5% solution means that in a 100 mL solution, there are 0.5 grams of the solute. Since one gallon equals 3,785 mL, we can calculate the total amount of solute required for one gallon. This is done by multiplying the percentage by the total volume:

- 0.5 grams/100 mL corresponds to 0.5 grams for every 100 mL.

- For 3,785 mL: (0.5 grams/100 mL) * 3,785 mL = 18.925 grams.

Next, understand that the term "36 index fluid" typically refers to a specific concentration. If we interpret the "36 index" as indicating that there are 36 grams of the solute in 100 mL of that fluid, we can establish how much of that fluid we need to achieve our goal.

To find out how much of the 36 index fluid is required to obtain approximately 18.925