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Which of the following is the correct representation of 0.5 grams in milligrams?

A.

500 mg

B.

0.005 mg

C.

5,000 mg

D.

50 mg

Answer and Explanation

The Correct Answer is A

Calculation:

  • conversion factor between grams and milligrams

1 gram = 1,000 milligrams

  • Convert 0.5 grams to milligrams

0.5 × 1,000 = 500 mg


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Related Questions

Correct Answer is A

Explanation

Ordered Dose: 25 mg

Available Concentration: 50 mg/5 mL

  • Calculate the volume to administer

Volume to administer = (Ordered Dose ÷ Concentration) × Volume of Concentration

Volume to administer = (25 ÷ 50) × 5

Volume to administer = 0.5 × 5

Volume to administer = 2.5 mL

Correct Answer is C

Explanation

A. Centi-: The prefix centi- represents 1/100 of the base unit. It is commonly used for measurements like centimeters, which are 1/100 of a meter, so it does not correspond to 1/1,000th.

B. Deci-: Deci- represents 1/10 of the base unit. For example, a deciliter is 1/10 of a liter. This is larger than 1/1,000th and is not the correct prefix.

C. Milli-: Milli- corresponds to 1/1,000 of the base unit. For instance, 1 milligram is 1/1,000 of a gram, and 1 milliliter is 1/1,000 of a liter, making it the correct prefix for this fraction.

D. Micro-: Micro- represents 1/1,000,000 (one-millionth) of the base unit, which is much smaller than 1/1,000th.

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