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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?

User Stephenr
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2 Answers

4 votes
molar mass of copper is 63.546

so malar mass of the laccase is

4* 63.546
-------------- = 651.754
0.39
User Lynn
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6 votes

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:


\frac{\text{Number of atoms of element}* \text{Atomic mass of element}}{\text{molecular mass of compound}}* 100

Percentage of copper:


(4* 63.55 g/mol)/(M)* 100=0.390\%


M=(4* 63.55 g/mol)/(0.390)* 100

M = 65,179.487 g/mol

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

User NeilC
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