Question

a single capsule of a common antibiotic medication contains 250 mg of the active ingredient. what is this mass in grams?
0.00025 g
0.0025 g
0.025 g
0.25 g
2.5 g

Explanation:

Step1: Recall unit conversion (mg to g)

We know that \(1\ \text{g} = 1000\ \text{mg}\), so to convert milligrams to grams, we divide by 1000. The formula is \(\text{mass in grams} = \frac{\text{mass in milligrams}}{1000}\).

Step2: Substitute the value

Given the mass in milligrams is 250 mg. So we calculate \(\frac{250}{1000}\) g.
\(\frac{250}{1000}=0.25\) g.

Answer:

0.25 g (corresponding to the option "0.25 g")