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If a prescription calls for 120 gm of hydrated petrolatum, how many ounces should be dispensed?

A. 1 oz
B. 120 oz
C. 200 oz
D. 4 oz

Answer :

To convert 120 grams of hydrated petrolatum to ounces, divide by 28.35 grams per ounce, which equals 4.23 ounces. This is then rounded to 4 ounces for practical dispensing purposes. So, the correct option is d.

If a prescription calls for 120 grams of hydrated petrolatum, to find out how many ounces should be dispensed we need to use a unit conversion factor.

Since we know that 1 ounce is approximately equal to 28.35 grams, we can set up a simple division to convert grams to ounces:

120 grams / 28.35 grams per ounce = 4.23 ounces.

When dispensing medicine, it's important to round to a number that makes practical sense, so in this case, we'd round down slightly to 4 ounces, because medication should not be given in partial doses unless specified.

Therefore, the answer would be dispensing 4 ounces of hydrated petrolatum.

Therefore, the correct answer is option d.

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