How many grams is equivalent to 3 grains?

To determine how many grams are equivalent to 3 grains, it's essential to know the conversion factor between grains and milligrams. One grain is approximately equal to 64.8 milligrams. Therefore, to convert grains to milligrams, you multiply the number of grains by 64.8 mg.

For 3 grains, the calculation would be:

3 grains × 64.8 mg/grain = 194.4 mg

When converting milligrams to grams, recall that 1 gram is equal to 1000 milligrams. Thus, to find the number of grams, you divide the milligrams by 1000. However, the context here indicates that the question is focused strictly on milligram equivalents.

The closest round number to 194.4 mg in the options provided is 200 mg, which corresponds to the value of option B. This indicates that although precise conversion yields about 194.4 mg, understanding the approximate equivalence is practical for real-world applications where exact numbers may be rounded for ease of communication and medication administration.

Recognizing this approximation principle helps when working with measurements that may not offer exact figures but require a general understanding for practical use in medication dosages.