How many moles of aluminum (Al) are present in a 54.0 g sample of aluminum? (Molar mass of Al = 26.98 g/mol)

• A. 0.020 moles
• B. 1.50 moles
• C. 0.500 moles
• D. 2.00 moles

Answer: (D)

Verified step by step guidance

1. Identify the given information: the mass of aluminum (Al) is 54.0 g, and the molar mass of Al is 26.98 g/mol.
2. Recall the formula to calculate moles from mass and molar mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
3. Substitute the given values into the formula: \(\text{moles of Al} = \frac{54.0\ \text{g}}{26.98\ \text{g/mol}}\).
4. Perform the division to find the number of moles of aluminum in the sample.
5. Compare the calculated moles to the provided answer choices to select the correct one.