Which of the following is equivalent to a mass of 9.31 g?

• A. 0.00931 kg
• B. 0.931 kg
• C. 9310 mg
• D. 931 mg

Answer: (A)

Verified step by step guidance

1. Understand the relationship between grams (g), kilograms (kg), and milligrams (mg). Specifically, 1 kg = 1000 g and 1 g = 1000 mg.
2. To convert grams to kilograms, divide the mass in grams by 1000 because kilograms are larger units: \(\text{mass in kg} = \frac{\text{mass in g}}{1000}\).
3. To convert grams to milligrams, multiply the mass in grams by 1000 because milligrams are smaller units: \(\text{mass in mg} = \text{mass in g} \times 1000\).
4. Apply these conversions to 9.31 g: calculate \$9.31 \div 1000\( to get the mass in kilograms and \)9.31 \times 1000$ to get the mass in milligrams.
5. Compare the converted values to the given options to identify which one matches the equivalent mass of 9.31 g.