Question

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?

Answer 1

%Cu = mass Cu x 100/molar mass compound.
0.39 = 4*atomic mass Cu*100/x
Substitute for atomic mass Cu and solve for x.

Answer 2

65200

Answer 3

6.51 x 10^4

Answer 4

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