Question

question 10
the bottle is labelled 200 mg/10 ml. the prescriber orders 0.2 g. how many ml do you give?
______ml
question 11
you are told to give the patient 200 mcg. the stock label reads 0.25 mg/ml. how many ml do you give?
______ml
question 12
stock: 100 mcg per tablet. order: 2.5 mg. how many tablets do you give?
answer: ______

Explanation:

Question 10

Step1: Convert grams to milligrams

Since \( 1\space g = 1000\space mg \), then \( 0.2\space g = 0.2\times1000 = 200\space mg \).

Step2: Set up proportion

Let \( x \) be the volume in mL. The concentration is \( 200\space mg/10\space mL \), so \( \frac{200\space mg}{10\space mL}=\frac{200\space mg}{x\space mL} \). Cross - multiplying gives \( 200x = 200\times10 \).

Step3: Solve for x

\( x=\frac{200\times10}{200}=10\space mL \).

Step1: Convert micrograms to milligrams

Since \( 1\space mg = 1000\space mcg \), then \( 200\space mcg=\frac{200}{1000}=0.2\space mg \).

Step2: Set up proportion

Let \( x \) be the volume in mL. The concentration is \( 0.25\space mg/mL \), so \( \frac{0.25\space mg}{1\space mL}=\frac{0.2\space mg}{x\space mL} \). Cross - multiplying gives \( 0.25x = 0.2\times1 \).

Step3: Solve for x

\( x=\frac{0.2}{0.25}=0.8\space mL \).

Step1: Convert milligrams to micrograms

Since \( 1\space mg = 1000\space mcg \), then \( 2.5\space mg = 2.5\times1000 = 2500\space mcg \).

Step2: Calculate number of tablets

Each tablet has \( 100\space mcg \). Let \( x \) be the number of tablets. Then \( x=\frac{2500\space mcg}{100\space mcg/tablet} \).

Step3: Solve for x

\( x = 25 \).

Answer:

\( 10 \)

Question 11