How many moles are present in 3.01 × 10^{23} molecules of H_2O?

• A. 0.25 moles
• B. 2 moles
• C. 0.5 moles
• D. 1 mole

Answer: (C)

Verified step by step guidance

1. Identify the given quantity: 3.01 \times 10^{23} molecules of H_2O.
2. Recall Avogadro's number, which is the number of molecules in one mole: 6.02 \times 10^{23} molecules/mole.
3. Set up the conversion to find moles from molecules using the formula: \(\text{moles} = \frac{\text{number of molecules}}{\text{Avogadro's number}}\).
4. Substitute the values into the formula: \(\text{moles} = \frac{3.01 \times 10^{23}}{6.02 \times 10^{23}}\).
5. Simplify the fraction to find the number of moles present in the given molecules.