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question 9
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the patient requires 250 mg of a drug. the tablets are labelled 0.5 g each. you will give
tablet(s).
type your answer in decimal form if necessary, do not use fractions.
question 10
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a prescriber’s order is for 0.45 g of a drug that comes in a bottle labelled 150 mg per 5 ml. you will give
ml.
type your answer in decimal form if necessary, do not use fractions.
question 11
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each day you are to give a total of 240 mg of a drug divided into 6 equal doses. you will give
mg in each dose.
type your answer in decimal form if necessary, do not use fractions.

Explanation:

Question 9

Step1: Convert units to be consistent

First, convert \(0.5\) g to mg. Since \(1\) g \( = 1000\) mg, then \(0.5\) g \(= 0.5\times1000 = 500\) mg.

Step2: Calculate number of tablets

Let \(x\) be the number of tablets. We know that the amount of drug per tablet is \(500\) mg, and the patient needs \(250\) mg. So we set up the equation \(500x = 250\). Solving for \(x\), we divide both sides by \(500\): \(x=\frac{250}{500}=0.5\).

Step1: Convert units to be consistent

Convert \(0.45\) g to mg. Since \(1\) g \( = 1000\) mg, then \(0.45\) g \(= 0.45\times1000 = 450\) mg.

Step2: Find the concentration per mL

The drug is \(150\) mg per \(5\) mL, so the concentration \(C=\frac{150}{5}=30\) mg/mL.

Step3: Calculate volume of drug needed

Let \(V\) be the volume in mL. We know that the amount of drug needed is \(450\) mg and the concentration is \(30\) mg/mL. Using the formula \(Amount = Concentration\times Volume\), we can solve for \(V\): \(V=\frac{450}{30}=15\).

Step1: Divide total dose by number of doses

The total daily dose is \(240\) mg, and it is divided into \(6\) equal doses. So we calculate the dose per administration by dividing \(240\) by \(6\): \(\frac{240}{6}=40\).

Answer:

\(0.5\)

Question 10