Step-by-step explanation:
To calculate the mass of copper (Cu) metal, we'll use the equation:
Mass (g) = number of moles × molar mass
The molar mass of copper (Cu) is given as 63.6 amu. However, we need to convert amu to grams (g) using the molar mass of 1 mole of copper (Cu).
1 mole of copper (Cu) has a molar mass of 63.6 g/mol.
Now let's calculate the mass of 3.5 moles of copper (Cu):
Mass (g) = 3.5 moles × 63.6 g/mol
Mass (g) = 222.6 g
Therefore, the mass of 3.5 moles of copper (Cu) is 222.6 grams.