How many moles Si in the dot?
1.400 x 10^4 atoms/6.022 x 10^23 = ??moles.
Convert that to grams.
?? moles x molar mass Si = grams.
#2. mass = volume x density.
You have mass and density, calculate volume.
3. volume = length^3; calculate length.
Post your work if you get stuck.
Very small crystals composed of 1000 to 100,000 atoms, called quantum dots, are being investigated for use in electronic devices.
(a) Calculate the mass in grams of a quantum dot consisting of 1.400 104 atoms of silicon.
(b) Assuming that the silicon in the dot has a density of 2.3 g/cm3, calculate its volume.
(c) Assuming that the dot has the shape of a cube, calculate the length of each edge of the cube.
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