If you have 0.5 moles of NaCl, how many formula units of NaCl do you have?

• A. 1.00 × 10^{22} formula units
• B. 1.20 × 10^{24} formula units
• C. 3.01 × 10^{23} formula units
• D. 6.02 × 10^{23} formula units

Answer: (C)

Verified step by step guidance

1. Understand that the problem asks to convert moles of NaCl to the number of formula units. A mole is a counting unit in chemistry that corresponds to Avogadro's number of entities (atoms, molecules, formula units, etc.).
2. Recall Avogadro's number, which is approximately \$6.02 \times 10^{23}\( entities per mole. This means 1 mole of any substance contains \)6.02 \times 10^{23}$ formula units.
3. Set up the conversion using the given amount of moles and Avogadro's number: multiply the number of moles by Avogadro's number to find the number of formula units.
4. Write the calculation as: \(\text{Number of formula units} = 0.5 \text{ moles} \times 6.02 \times 10^{23} \frac{\text{formula units}}{\text{mole}}\).
5. Perform the multiplication to find the total number of formula units (note: the problem asks for the process, so do not calculate the final number here).