How many moles of copper (Cu) are present in 65.8 g of Cu? (Atomic mass of Cu = 63.5 g/mol)

• A. 0.96 moles
• B. 1.04 moles
• C. 1.20 moles
• D. 0.52 moles

Answer: (B)

Verified step by step guidance

1. Identify the given information: mass of copper (Cu) is 65.8 g, and the atomic mass of Cu is 63.5 g/mol.
2. Recall the formula to convert mass to moles: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
3. Substitute the given values into the formula: \(\text{moles of Cu} = \frac{65.8}{63.5}\).
4. Perform the division to find the number of moles of copper present.
5. Compare the calculated value with the given options to select the correct number of moles.