We are asked how many Ge atoms contain a 9 nm quantum dot of germanium.
V = 381.7 nm3
Very small crystals composed of 1000 to 100,000 atoms, called quantum dots, are being investigated for use in electronic devices.. (c) The density of germanium is 5.325 g/cm3 . If you made a 9 nm quantum dot of germanium, how many Ge atoms would it contain? Assume the dot is spherical. Express your answer using four significant figures.
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