Fungal laccase, a blue protein found in wood-rotting fungi, is 0.390% cu by mass. if a fungal laccase molecule contains four copper atoms, what is the molar mass of fungal laccase?

Respuesta :

molar mass of copper is 63.546

so malar mass of the laccase is

4* 63.546
-------------- = 651.754
0.39

Answer:

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

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:

[tex]\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of compound}}\times 100[/tex]

Percentage of copper:

[tex]\frac{4\times 63.55 g/mol}{M}\times 100=0.390\%[/tex]

[tex]M=\frac{4\times 63.55 g/mol}{0.390}\times 100[/tex]

M = 65,179.487 g/mol

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