Question

a nurse is reviewing measurement systems to perform dosage calculations with a newly licensed nurse. which of the following instructions should the nurse include? to convert g to mg, move the decimal point 3 places to the right. liters is a unit of measurement for distance. the metric system uses fractions rather than decimals. grains is used as a measurement of weight in the metric system.

Explanation:

• Analyze each option:
• Option 1: 1 gram ($g$) = 1000 milligrams ($mg$), so converting $g$ to $mg$ means multiplying by 1000, which is moving the decimal point 3 places to the right. This is correct.
• Option 2: Liters ($L$) is a unit of volume, not distance. Distance units in metric are meters, kilometers, etc. So this is incorrect.
• Option 3: The metric system uses decimals (e.g., 1.5 kg, 0.5 L) rather than fractions for ease of calculation and standardization. So this is incorrect.
• Option 4: Grains is a unit of weight in the apothecary or avoirdupois system, not the metric system (metric weight units are grams, kilograms, etc.). So this is incorrect.

Answer:

A. To convert g to mg, move the decimal point 3 places to the right.