Question

question 19 not yet answered marked out of 1.00 flag question the doctor orders 250 mg. the drug available is 1 g/5 ml. how many ml should be injected? answer: question 20 not yet answered marked out of 1.00 flag question if 2 tablets are given 4 times a day, how many are given in a 24 - hour period? answer: question 21 not yet answered marked out of 1.00 flag question if 500 mg are to be given every 6 hours how many mg are given in a 24 - hour period? answer:

Explanation:

Question 19

Step1: Convert units to be consistent

First, convert 1 g to mg. Since 1 g = 1000 mg, the drug concentration is 1000 mg/5 mL. Simplify this to 200 mg/mL (because 1000 ÷ 5 = 200).

Step2: Use the formula for dosage calculation

The formula is \( \text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Concentration (mg/mL)}} \). The desired dose is 250 mg, and the concentration is 200 mg/mL. Wait, no, wait. Wait, the concentration is 1 g/5 mL, which is 1000 mg/5 mL = 200 mg per mL? Wait, no, 1000 mg in 5 mL means per mL it's 1000/5 = 200 mg/mL? Wait, no, that would mean 200 mg per mL, but we need to find how much mL for 250 mg. Wait, maybe I messed up. Let's do it again. The drug is 1 g per 5 mL. So 1 g = 1000 mg. So 1000 mg is in 5 mL. So we can set up a proportion: \( \frac{1000 \, \text{mg}}{5 \, \text{mL}} = \frac{250 \, \text{mg}}{x \, \text{mL}} \). Cross-multiplying: \( 1000x = 250 \times 5 \). Then \( 1000x = 1250 \), so \( x = \frac{1250}{1000} = 1.25 \) mL.

Step1: Determine the number of times per day

The tablets are given 4 times a day.

Step2: Calculate total tablets

Each time 2 tablets are given. So total tablets in a day is \( 2 \, \text{tablets/time} \times 4 \, \text{times/day} = 8 \) tablets.

Step1: Find how many times the dose is given in 24 hours

The dose is given every 6 hours. So in 24 hours, the number of times is \( \frac{24 \, \text{hours}}{6 \, \text{hours/time}} = 4 \) times.

Step2: Calculate total mg in 24 hours

Each time 500 mg is given. So total mg is \( 500 \, \text{mg/time} \times 4 \, \text{times} = 2000 \) mg.

Answer:

1.25

Question 20