Answer: 3 moles of Copper weigh 190.5 grams.
Explanation:
The atomic mass of Copper (Cu) is 63.5 g/mol.
To find the mass of 3 moles of Copper, we multiply the atomic mass by 3:
63.5 g/mol × 3 mol = 190.5 g
So, 3 moles of Copper weigh 190.5 grams.