What is the total volume in mL when given 7 oz. of liquid?

To convert ounces to milliliters, it is essential to use the correct conversion factor. One fluid ounce is approximately equivalent to 29.57 milliliters. Therefore, to find the total volume in milliliters for 7 ounces, the calculation would be:

7 oz. × 29.57 mL/oz. = 207.99 mL.

When rounded to the nearest hundred, this value is about 200 mL. It’s important to note that in this context, the answer of 250 mL is incorrect when following standard conversion practices. However, if we were to consider the nearest standard measurement commonly used in practice or rounding principles beyond typical mathematical rounding rules, 250 mL may reflect an instructional rounding practice.

It's crucial for nursing and healthcare professionals to accurately convert measurements using reliable conversion factors, as they relate directly to patient care and medication administration where precision is key.