Answer:
191 grams Cu
Step-by-step explanation:
To find the mass of the copper metal, you need to multiply the given value by the atomic mass. The atomic mass is a ratio that compares the mass (g) of copper per 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator).
Atomic Mass (Cu): 63.546 g/mol
3 moles Cu 63.546 grams
-------------------- x ------------------------ = 191 grams Cu
1 mole
**the final answer has be rounded to 3 sig figs