How many carbon atoms are present in 5.50 g of C?

• A. 2.76 × 10^{23} atoms
• B. 1.10 × 10^{24} atoms
• C. 5.50 × 10^{22} atoms
• D. 6.02 × 10^{23} atoms

Answer: (A)

Verified step by step guidance

1. Identify the given information: mass of carbon (C) is 5.50 g.
2. Recall the molar mass of carbon, which is approximately 12.01 g/mol. This tells us how many grams are in one mole of carbon atoms.
3. Calculate the number of moles of carbon in 5.50 g using the formula: \(\text{moles} = \frac{\text{mass}}{\text{molar mass}} = \frac{5.50}{12.01}\).
4. Use Avogadro's number, \$6.022 \times 10^{23}\( atoms/mol, to convert moles of carbon to number of atoms: \)\text{atoms} = \text{moles} \times 6.022 \times 10^{23}$.
5. Combine the calculations from steps 3 and 4 to find the total number of carbon atoms in 5.50 g.