How many moles are present in 3.00 g of ethanol (C2H5OH)?

• A. 0.130 mol
• B. 0.0330 mol
• C. 0.500 mol
• D. 0.0652 mol

Answer: (D)

Verified step by step guidance

1. Identify the molecular formula of ethanol, which is C\_2H\_5OH, and determine its molar mass by summing the atomic masses of all atoms in the molecule.
2. Calculate the molar mass of ethanol using atomic masses: Carbon (C) = 12.01 g/mol, Hydrogen (H) = 1.008 g/mol, and Oxygen (O) = 16.00 g/mol. Use the formula: \(\text{Molar mass} = 2 \times 12.01 + 6 \times 1.008 + 16.00\).
3. Use the formula to find moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
4. Substitute the given mass of ethanol (3.00 g) and the calculated molar mass into the formula to set up the calculation for moles.
5. Perform the division to find the number of moles of ethanol present in 3.00 g, which will give you the answer.