Answer:
65,179.487 g/mol is the molar mass of fungal laccase.
Step-by-step explanation:
Percentage of copper in Fungal laccase = 0.390
Molar mass of fungal laccase = M
Number of copper atom in 1 fungal laccase molecule = 4
Atomic mass of copper = 63.55 g/mol
Percentage of an element in a compound:
Percentage of copper:


M = 65,179.487 g/mol
65,179.487 g/mol is the molar mass of fungal laccase.