How many molecules are present in 4.25 mol of CCl_4?

• A. 4.25 × 10^{23} molecules
• B. 1.02 × 10^{24} molecules
• C. 2.56 × 10^{24} molecules
• D. 6.02 × 10^{23} molecules

Answer: (C)

Verified step by step guidance

1. Identify the quantity given: 4.25 moles of CCl_4. We want to find the number of molecules in this amount.
2. Recall Avogadro's number, which is the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is \$6.02 \times 10^{23}$ particles per mole.
3. Set up the calculation to find the number of molecules by multiplying the number of moles by Avogadro's number: \(\text{Number of molecules} = 4.25 \text{ mol} \times 6.02 \times 10^{23} \frac{\text{molecules}}{\text{mol}}\).
4. Perform the multiplication of the numerical coefficients (4.25 and 6.02) and add the exponents of 10 if necessary, keeping track of units carefully.
5. Express the final answer in scientific notation to represent the total number of molecules in 4.25 moles of CCl_4.