Question

A doctors order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required?

Answer 1

For a `0.125*g` dose, `2.5*mL` of the suspension must be administered.

Explanation:

`1*mg` `=` `1xx10^-3*g`, likewise `1000*mg` `-=` `1.000*g`

We want a `250*mg` or `0.250*g` dose, and thus for a concentration of `(250*mg)/(5*mL^-1)=50*mg*mL^-1`, we require `2.5*mL` of the suspension.