How many moles of atoms are in 5.00 g of ¹³C?

• A. 0.500 moles
• B. 0.385 moles
• C. 0.615 moles
• D. 0.250 moles

Answer: (B)

Verified step by step guidance

1. Identify the given information: You have 5.00 g of ¹³C (Carbon-13).
2. Determine the molar mass of ¹³C. Since the atomic mass of ¹³C is approximately 13 g/mol, use this value for calculations.
3. Use the formula to convert grams to moles: \( \text{moles} = \frac{\text{mass in grams}}{\text{molar mass}} \).
4. Substitute the given values into the formula: \( \text{moles} = \frac{5.00 \text{ g}}{13 \text{ g/mol}} \).
5. Calculate the result to find the number of moles of ¹³C atoms in 5.00 g.