Answer:
B. 180 mg
Step-by-step explanation:
In order to answer the given problem we need to be aware that:
1000 milligrams = 1 milliliter
The above means that in 1 milliliter a 100% solution means 1000 milligrams. Because we have 18% solution, then:
(1000 milligrams / 1 milliliter) * 18% =
(1000 milligrams / 1 milliliter) * (18/100) =
(1000*18/100) milligrams/milliliter =
180 milligrams/milliliter
In conclusion, the answer is B. 180 mg.
