If 0.250 mol of Cu is produced in a reaction, and the molar mass of Cu is 63.55 g/mol, how many grams of Cu are produced?

• A. 15.9 g
• B. 63.6 g
• C. 31.8 g
• D. 127.1 g

Answer: (C)

Verified step by step guidance

1. Identify the given information: the amount of substance (in moles) of copper (Cu) produced is 0.250 mol, and the molar mass of Cu is 63.55 g/mol.
2. Recall the relationship between moles, molar mass, and mass: \(\text{mass} = \text{moles} \times \text{molar mass}\).
3. Set up the calculation using the formula: \(\text{mass of Cu} = 0.250\ \text{mol} \times 63.55\ \text{g/mol}\).
4. Perform the multiplication to find the mass of Cu produced (do not calculate the final number here, just set up the expression).
5. Interpret the result as the mass in grams of copper produced in the reaction.