How many moles of atoms are present in 8.00 g of 13C?

• A. 0.615 mol
• B. 0.308 mol
• C. 1.00 mol
• D. 0.500 mol

Answer: (A)

Verified step by step guidance

1. Identify the element and isotope given: 13C is a carbon isotope with an atomic mass of approximately 13 g/mol.
2. Write down the given mass of the sample: 8.00 g of 13C.
3. Recall the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
4. Substitute the known values into the formula: \(\text{moles} = \frac{8.00\ \text{g}}{13\ \text{g/mol}}\).
5. Perform the division to find the number of moles of 13C atoms in the sample.